Projects
Predictive Tool for Unaccounted-For Gas (UAG) Identification
The Unaccounted-for Gas (UAG) project aims to develop a predictive tool that identifies and quantifies UAG across the National Transmission System (NTS). Leveraging 12-18 months of SCADA data the tool will simulate gas flow and metering behaviour to pinpoint anomalies and reduce losses. UAG currently represents significant financial cost to the consumer; even a 1% reduction could yield practical savings. The project aligns with RIIO-2 NIA criteria and supports regulatory compliance under the Gas Transporter Licence Part J of Special Condition 5.6 (System operator external incentives revenues and costs) requiring National Gas to undertake work to investigate the causes of UAG. It builds on prior research and integrates learnings from international benchmarks. The initiative will enhance operational efficiency improve data transparency and support long-term decarbonisation goals through better system visibility and control.
HyNTS Operational - Qualification of Pressure Vessels
This project assessed whether a fracture mechanics approach can be used to justify existing gas cleaning scrubbers for future hydrogen or hydrogen blend service. The work focused on a representative Kings Lynn scrubber and considered crack-like flaws hydrogen-affected toughness residual stresses pressure cycling and fatigue crack growth. The results indicate that the approach is viable for demonstrating integrity in large parts of the scrubber particularly the upper vessel and nozzle welds but further evidence is required before it can be applied across the wider scrubber population.
Impact of Hydrogen and on NTS Oils & Greases – Phase 2
Phase 1 of the project compiled a list of oils and greases considered to be gas-facing on the NTS along with identifying functional and material property requirements of these products. Proposed standards and testing methodologies were also outlined to inform the next phase of the project. In Phase 2 the project will proceed with additional required activities to ensure the safe utilisation of NTS oils/greases in a hydrogen pressurised environment. These activities include laboratory testing for lubricants and functional testing for sealants to assess degradation and performance of these products in hydrogen. Subsequently requirements for in-service monitoring will be identified.
NTS Pipeline Assessments Phase 2
This project will build upon previous work to inform decisions relating to the repurposing of National Transmission System pipelines for 100% hydrogen and hydrogen-natural gas blends. New input data will be generated and collated the assessment methodology will be refined and an alternative assessment method probabilistic will be utilised and the resulting network impact will be considered.
This project will generate the following benefits:
- More accurate assessment of the capability of the NTS to transport 100% hydrogen and hydrogen-natural gas blends.
- Data on the impact of low percentage blend hydrogen on pipeline materials.
- Standardised document for Engineering Critical Assessments (ECA) of hydrogen and hydrogen-natural gas blend pipelines and pipework.
Greater understanding on the effect of hydrogen on the design and operation of pipeline systems.
Gas Inhibitors for Hydrogen Pipelines - Phase 3
The Phase 3 project on gas inhibitors for hydrogen pipelines aims to translate lab-scale findings into practical applications for the UK’s National Transmission System. It focuses on validating the effectiveness of oxygen and alternative inhibitors in mitigating hydrogen embrittlement addressing unresolved safety and integrity concerns from previous phases and designing a plan for safe integration into existing infrastructure. The project includes physical demonstration planning and network design to assess technology implementation.
Network Intelligence: Bio- Methane Retractable Probe
The Retractable Probe directly tackles a critical constraint in biomethane integration: the disconnect between modelled and actual network capacity during low-demand periods. By enabling real-time high-resolution flow data from retrofitted PRIs this innovation unlocks latent capacity allowing for more confident dynamic flow commitments. With proven international precedents and a low-cost scalable design the probe offers a transformative step toward decarbonising the UK’s gas infrastructure—turning data scarcity into actionable intelligence and accelerating the transition to a greener more resilient energy system.
Application of artificial intelligence for modelling and optimisation of maintenance policies for Hydrogen assets
Development of an artificial intelligence powered application for the purpose of modelling and optimising equipment maintenance policy according to asset reliability predicted performance and the defined desirable maintenance strategy. With projects to transport 100% Hydrogen in industrial settings gaining increasing traction this project will serve as a pilot to implement smarter more intelligent ways of maintaining these assets to increase reliability reduce operational costs and ultimately prove the credibility of hydrogen as an alternative energy source.
Risk of Microbial Corrosion due to Hydrogen Transportation
H2 Site Safety Systems
This project will examine the suitability of existing Fire and Gas (F&G) detection and suppression systems for use with hydrogen blends of up to 20%. These systems comprise: fire detection fire suppression gas detection and associated control systems. They are found in compressor cabs and at network terminals.
Through CFD modelling three representative F&G systems will be individually assessed for compatibility with blends and will then be used as examples to make comments on the suitability of other F&G systems on the network. Where assets or control systems are not suitable this project will not design a new system but recommend where changes should be made and demonstrate how those changes safely manage risk – including cost estimation for upgrade or retrofit.
Integrity Management of Hydrogen Pipelines
Existing defect assessments and repair methodologies designed for natural gas service are aligned with the T/PM/P/** and T/PM/P/** management procedures and are adopted to inspect assess and repair pipelines for defects and take suitable measures to mitigate them. However the scope and applicability of the assessment inspection and repair techniques in the presence of high-pressure hydrogen remain uncertain. The key questions which form an outline of the project are:
- What are the different types of defects we may encounter or consider injurious in the presence of hydrogen?
- What is the impact of hydrogen on each defect type? Have the mechanisms of failure changed for each defect type after hydrogen-natural gas blending?
- Will the existing repair techniques be applicable under transmission of high-pressure hydrogen and hydrogen-natural gas blends?
- Can we implement the defect assessment inspection and repair methodologies safely? Are the techniques safe and suitable for the pipeline operations and maintenance teams?
The project seeks to answer the above in addition to understanding the types and extent of repairs across the NTS and assess the impact of hydrogen on the effectiveness of these inspection assessment and mitigation technologies.
Application of Functional Blending - Testing a Market-led Approach
Wales & West Utilities has developed a Regional Decarbonisation Pathway to provide an overarching strategic plan for the network in Wales and the South West of England. To deliver that pathway more detailed assessment and planning is required to facilitate the progression of opportunities in particular areas.
In 2023 WWU supported Cadent as the lead partner in the development and delivery of a Functional Blending Specification (FBS) which has progressed the technical understanding of how blending equipment can be practically applied within the context of existing gas network assets (
Rising Pressure Reformer Study
This project will assess the application of Rising Pressure Reformer (RiPR) technology to produce a tuneable blend of biogenic methane and hydrogen supporting the decarbonisation of gas networks. The project will focus on the how control of the gas produced would fit with requirements for network injection and assessing locations for connection.
Energy Plan Translator
Develop a flexible and adaptable toolset for the rapid analysis of Local Area Energy Plans (LAEPs). This will convert qualitative statements to quantified metrics and identify key network specific planning parameters.
Low Carbon Conversion of Non Domestic Properties Utilising Distributed Natural Gas
This project investigates the technical and economic feasibility of converting non-domestic buildings from natural gas to low carbon energy sources specifically hydrogen and electricity. It aims to address the significant evidence gap around the conversion of commercial and institutional buildings that are currently supplied by the GB gas distribution networks. The study will assess a wide range of building archetypes including care homes schools hospitality venues and light industrial sites using a combination of literature review site surveys detailed system designs and technoeconomic modelling. The outputs will inform future energy policy support infrastructure planning and help ensure safe and cost-effective deployment of low carbon technologies in non-domestic settings.
Digital Inclusion in Rural & Vulnerable Communities Phase 2
Digital exclusion remains a significant and persistent challenge across the UK with approximately 10 million people unable to access online services due to a lack of internet connectivity digital skills or confidence. In rural and remote communities this challenge is compounded by poor infrastructure and geographic isolation. For households already identified as vulnerable the inability to receive timely communications from energy networks can have serious consequences.
Energy networks currently rely on a standard set of channels to communicate critical information such as planned outages safety alerts and emergency notifications. Letters go unread door-knocking is costly and slow SMS messages are widely distrusted and digital channels by definition exclude the very households that need the most support. No single channel reliably reaches digitally excluded consumers at speed. This gap represents both a safeguarding risk for customers and a significant compliance and reputational challenge for networks operating under Ofgem’s consumer vulnerability obligations.
This project proposes a fundamentally new approach: the Message Beacon is a low-cost physical internet-free device distributed to households to alert customers that an important energy network message is available to be read. The notification signal is received via Bluetooth or Near Field Communication (NFC) from a nearby mobile asset (such as a van field engineer or bin lorry) and is represented on the Message Beacon using a flashing LED. The customer taps the Message Beacon with an NFC-enabled smart device to display the energy network message. No internet connection is required in the home and no digital literacy is assumed. The Message Beacon brings the message to the person rather than expecting the person to come to the channel.
This project aims to take the Message Beacon concept that was established and prototyped in Phase 1 into a real-world pilot. Initial pilot devices will deliberately use household WiFi and mains power in place of the target transmission and power architecture. This isolates the household interaction layer for evaluation so findings are attributable to human factors rather than transmission reliability.
Phase 2 will deliver the following key outputs:
- Full Message Beacon MVP: hardware scaled to pilot quantity (minimum of 30 units) front-of-house and back-of-house software complete end-to-end system tested before deployment.
- Real-World Pilot Evaluation Report: reach rates time-to-tap and engagement by household type; qualitative findings on comprehension and behaviour change; baseline comparison against existing methods.
- Infrastructure Research Report: a desk-based technical assessment of candidate transmission pathways including DCC and smart meter capability BLE mesh LoRa 2G/3G switch-off implications and mobile assets with an indicative direction on each and a stated assessment of the development distance to manufacture. Pathway prototypes where produced are standalone and not integrated with the live Message Beacon system.
- Standalone Rollout Model and Decision Presentation: final presentation including unit economics installation process household targeting and message governance; infrastructure options paper; decision presentation to all participating networks.
Technology Readiness Level (TRL)
Start TRL: 4 (Technology validated in laboratory environment)
The core system architecture has been designed and validated experimental hardware has been built and tested and both the front-of-house and back-of-house interfaces have been prototyped and tested with real users in controlled settings.
End TRL: 6 (Technology demonstrated in a relevant end-to-end environment)
By the end of Phase 2 the full end-to-end prototype system will have been demonstrated in a live pilot with approximately 25 individual households.
Domestic Air Ingress Mitigations
This project will help to provide assurance to UK Gas Distribution Network Operators (GDNOs) and wider industry on the safe design of domestic gas appliances in a future where hydrogen is being distributed in network pipelines. A risk to the normal safe operation of appliances under 100% hydrogen operation exists where a flammable hydrogen/air mixture is supplied to the appliance creating the potential for flashback to occur within the gas installation pipework. This work will provide assurance that domestic appliances designed to operate on 100% hydrogen are designed in a way which do not enable flashback to occur.
The project will also investigate the long-term feasibility of installing an auto-locking Emergency Control Valve (ECV) at the end of 100% hydrogen networks to ensure that any reinstatement of supply after a period of isolation can only be undertaken by a competent gas engineer.
Internal Stress Corrosion Cracking (ISCC) Pipeline Screening Tool
Being able to repurpose transmission assets for use with hydrogen and hydrogen blends can create a reliable and affordable option for decarbonising the UK and achieving Net Zero by 2050. A reliable and affordable energy system is needed to create “a fair affordable and inclusive transition to low carbon energy” (OFGEM) for all consumers (vulnerable or otherwise).
ISCC is potentially a major risk to the integrity of high-pressure pipelines repurposed for hydrogen blends. A means of assessing the risk is required as part of a pipeline integrity management system. This project aims to develop a clear risk assessment methodology which updates and enhances the methodology under NIA_NGGD0008. The methodology will then be deployed and tested across the Cadent LTS pipeline network with physical inspections being carried out on locations with high risk of ISCC.
Excess Flow Valve (EFV) Durability
This project will help to inform UK Gas Distribution Network Operators (GDNOs) and wider industry on the long-term suitability of existing Excess Flow Valve (EFV) designs in a future where hydrogen is being distributed in network pipelines. A risk to normal EFV functionality exists in the event that an ignition occurs within the downstream gas installation pipework and this project will help to understand the effectiveness of existing EFV designs to manage this risk identifying any necessary modifications to existing EFV designs where appropriate.
A new and efficient way of detecting CO exposure
Working in partnership with Sheffield Hallam University this research project will aim to identify via a Proof-of-Concept model a new biomarker for Carbon Monoxide (CO) exposure that is sensitive to lower exposures persists in biofluids for longer than Carboxyhaemoglobin (COHb) and can be measured using a Lateral Flow Test (LFT). Alongside this research the project will also carry out engagement with local communities in an information campaign and determine their attitude to a LFT for CO exposure.
CNG/LNG Feasibility for HGVs
Currently there is a planned future ban on diesel HGVs (2035 for <26t 2040 for >26t). This affects WWU as we operate a fleet of c. 1300 commercial vehicles including 58 HGVs.
This project will assess the potential for deploying WWU HGVs powered by Compressed Natural Gas (CNG) and biogas as low-carbon alternatives to diesel vehicles. The study aims to evaluate vehicle availability route suitability refuelling infrastructure fuelling frequency productivity emissions performance and long-term operational viability.
By investigating new options for our HGV Vehicles fuel WWU are looking to operate the network in a way which will assist with the whole system energy transition as in it lowers operational emissions. This is currently not done by any networks in GB so is a novel operational practice directly related to the operation of the network.
Commercial Vehicle Fleet – Development of Total Cost of Operation Model
Decarbonisation of UK transport and the related Zero Emission Vehicle (ZEV) mandate requires companies to transition their commercial vehicle fleets to Battery Electric Vehicles (BEV) or alternative new emerging technologies (e.g. FCEC). As an operational utility network with responsibility for public safety WWU’s fleet undergoes a more challenging and varied range of duty cycles than most commercial fleets includes vehicles that are required to provide on-site power and must be capable of meeting WWU’s statutory duty to respond quickly to Public Reported Escapes.
Within this challenging operational context WWU must deliver a fleet transition at the lowest feasible cost to assure value for money for our customers. This is further complicated by the need to plan the fleet transition while the associated technological and policy landscape continues to evolve in parallel. Although the learnings generated from the project will be specific to WWU’s fleet as a case study they will be applicable to any networks with an operational fleet.
To assure a cost-effective transition and derisk future operations WWU require a Total Cost of Operation (TCO) model. This will be specifically targeted at our particular operational context capable of assessing the costs and capabilities of a range of ZEV options and crucially must be easy for staff to adopt for internal use and update in the future as new data and/or technologies become available.
The purpose of this project is to provide WWU with a TCO model that addresses our specific operational requirements ensuring that plans and investment decisions will be grounded in real-world technology assessments and our operational fleet data.
Biomethane feedstock deliverability
Cadent have been working with The Green Gas Taskforce to commission a series of reports that examine the benefits of greater biomethane generation to Great Britain’s energy system as well as the economic benefits that such volumes of green gas could provide. Work conducted by Alder BioInsights in their “Green Gas Future” report concluded that biomethane volumes of 120 TWh are possible in the UK by 2050 based on technical potential of UK feedstocks.
This project seeks to explore the operational emissions market and developmental implications of meeting the potential volumes published by Alder BioInsights (120 TWh pa by 2050) as well as the implications of meeting the NESO FES 25 Holistic Transition scenario relating to the production of biomethane in the UK (36 TWh per annum by 2035 and 64 TWh per annum by 2050).
The conclusions of this project will be published in a public report entitled “Delivering Green Gas” that:
- Outlines the viability benefits and key questions behind the integration of the UK’s agricultural supply chain AD industry and gas distribution networks.
- Highlights where they may be trade-offs or unintended consequences introduced by scaling feedstock production for biomethane and if there are ways that these can be addressed to mitigate the impact.
- Defines concrete actions that need to be taken in the agricultural sector by agricultural policy makers and others to unlock the feedstock volumes set out in the Alder BioInsights work and the NESO scenarios where this is appropriate and doesn’t introduce undesirable consequences.
- Sets out the broader economic and environmental benefits that could be provided in delivering these volumes of biomethane beyond the energy sector and particularly to the UK’s agricultural sector.
Calorific Gas Sensor
The UK and Irish gas networks are undergoing a major transition to support the integration of green gases including biomethane and hydrogen. A significant challenge is the inability of the current gas billing infrastructure based on flow-weighted average calorific value (CV) measurements taken at National Transmission System (NTS) offtakes to accurately reflect the gas composition received by consumers—particularly with the increasing number of decentralised injection points. This discrepancy presents a technical and regulatory hurdle to achieving fair and transparent billing.
This programme is leveraging 3 suppliers to develop a range of novel calorific value sensors that will enable calorific value to be accurately measured at different points on the network without the need for venting.
The programme comprises of 3 individual projects which will develop each suppliers’ technology up to a sufficiently high TRL where the sensors are ready to be trialled in the field. Each supplier will be delivering their own scope of work but will be expected to share a reasonable amount of information with each other in order to ensure maximum value is obtained from this programme. The innovators will not be expected to disclose any information that could provide them with a competitive advantage over the other solutions
INNOVATIVE MONITORING AND CONTROL OF PIPELINE CONSTRUCTION
Cadent proposes to trial “Digital Inspector” (DI) an innovative platform that enhances real-time control inspection and recording of pipeline construction activities. Digital Inspector provides verifiable evidence of weld quality supervises critical parameters live during construction and generates a complete digital record for asset integrity.
This project will trial Digital Inspector across multiple Cadent construction projects in 2025/26 working closely with Cadent’s contractors to assess practical usability contractor acceptance and the impact on existing BAU processes.
Greenhouse Gas Removals
This project will assess the potential for biomethane production to deliver Greenhouse Gas Removals (GGRs) through the capture transport and permanent storage of biogenic CO₂ released during biogas upgrading and through the utilisation of biomethane at facilities equipped with carbon capture.
The work will establish the potential scale and economics of biomethane-derived GGRs in the UK assess opportunities to integrate biomethane with the developing UK Carbon Capture Utilisation and Storage (CCUS) sector and identify policy and commercial barriers currently limiting deployment.
The project will provide evidence to support the Green Gas Taskforce in demonstrating the potential contribution of green gases to the UK’s transition to Net Zero and informing future development of the GGR policy and business model framework.
RIVAN Synthetic Gas – Review of RIVAN RNG Process
A technical review study assessing the design and operational performance of a novel renewable natural gas process including its integration with variable renewable energy sources to inform suitability for grid injection and support future deployment and strategic decision-making within a low carbon energy system.
Plastic to Gas (CART) Feasibility Study
The project will deliver an integrated feasibility assessment of Carbon Recycling Technology (CART) combining laboratory validation independent technical due diligence and commercial analysis into a single unified decision framework.
The objective is to determine whether CART can be progressed to demonstrator projects and ultimately commercialised as a low-carbon gas-to-grid solution for waste plastics and develop technology from TRL 2 to TRL 5.
The project is to run for approximately 4 months and will establish baseline scalability of synthesis and grid injection of waste-derived synthetic natural gas (SNG). This will enable the creation of a strong evidence-based bid to pursue SIF funding to design and build a pilot scale CART demonstrator in future development stages.
Risk Assessment Methodologies for Pipelines & AGIs 2026-2027
The UK’s high pressure gas transmission and distribution networks-which comprise of buried pipelines and above ground installations (AGIs) pose potential major safety hazards in the rare event of gas release. Effectively managing these risks is challenging due to several interrelated issues such as outdated or fragmented risk assessment methodologies where existing tools and methodologies need to be continuously updated to reflect regulatory and standards change. Individual gas network operators do not experience enough major incidents to statistically derive meaningful failure frequencies. This limits their confidence in risk estimates unless data is pooled and collectively analysed across the industry. Risks vary significantly between diverse asset types and a consistent integrated methodology is hence needed to address this complexity.
National Gas Transmission and Cadent Gas must demonstrate through credible up-to-date safety cases that risks are understood quantified realistically and managed to as low as reasonably possible (ALARP). The continued enhancement of these methodologies will further strengthen assurance in risk management.
SmartMOB
SmartMOB is a proof-of-concept project that will develop a data driven decision support model for the decarbonisation of multi-occupant buildings (MOBs) including flats apartments and mixed-use developments. MOBs present a significant decarbonisation challenge because they combine shared heating systems complex ownership structures diverse customer needs and practical constraints around reinforcement access cost allocation and disruption.
The project will explore how datasets across gas networks electricity networks local planning building data and representative customer-level data can be catalogued and connected. This will then be used to generate insight into heat demand patterns reinforcement needs appliance behaviour decarbonisation options and retrofit pathways.
The main outputs will include a catalogue of relevant data sources a data gap assessment analysis of high-rise gas energy demand stakeholder personas a prototype MOB decarbonisation model and a detailed pilot plan for a subsequent phase.
The Role of Gas Distribution Networks in Power Generation and CHP Phase 2
Phase 2 builds on Phase 1 by quantifying the long-term role system value and network interaction of gas distribution network-connected power generation. It will assess industrial and commercial combined heat and power and distribution-connected flexible generation under alternative decarbonisation pathways. The study will evaluate economic value system resilience future gas demand and interactions between gas and electricity infrastructure supporting network planning and engagement with the National Energy System Operator Ofgem and government.
Hydrogen Environment Testing of Girth Welds Phase 2 - Constant Load Testing
Previous testing carried out under NIA has outstanding gaps that require further testing to close. Completing the additional testing will confirm actual fracture toughness values to be used and the corresponding J value from the crack growth resistance curve. The project outputs are required and will be used to progress design specification and procurement processes for hydrogen major projects. The results can also be applied for repurposing assessments.
AI-Driven Policy Transformation for Hydrogen Blending in Gas Distribution Networks
Development of an AI tool to implement an AI-Driven Policy Transformation for Hydrogen Blending in Gas Distribution Networks
Biomethane Connection Optimisation
This project will set out how biomethane connections processes can be standardised across all GDNs and National Gas and evaluate why biomethane producers don’t operate at full injection capacity.
Finding the Hidden Vulnerable Stage 2
Following on from Stage 1 of the project which assessed if a predictive model could be used to find hidden vulnerability the next stage of the project is focused on identifying customers in vulnerable situations whose heat comes from Cadent delivered gas that are missing out on the protections that the Priority Service Register (PSR) brings because they are “hidden” behind a non-domestic supply contract and may not be immediately visible through existing data sets and ways of working. The project aims to proactively identify and support hidden customers in vulnerable situations within Cadent’s network by developing a data-driven model that integrates existing datasets from different sources ensuring that they receive the support that they need in the event of an interruption to supply.