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H21 Projects

Led by Northern Gas Networks

The H21 programme comprises multiple projects to tackle the many different challenges of a hydrogen gas conversion. They are funded by Ofgem through their Network Innovation Competition (NIC) and Network Innovation Allowance (NIA) funding streams and involve different partners to give access the very best areas of expertise. Our completed projects include reports.

Current Projects

H21 NIC – Phase 2

The H21 NIC Phase 2 project will be taking the work from Phase 1 one step further and investigating whether or not the day to day procedures that we undertake on the gas network can still be undertaken safely in order to allow us to maintain a safe network.

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NIA 268 – Pre-Enabling Works for Phase 3, Occupied Trials

This NIA project is focused on preparing and enabling work for the first occupied 100% hydrogen trials which will form Phase 3 of H21.

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NIA 270 – Initial Hydrogen Supply Strategy

This NIA project is focused on exploring the effects of delivering hydrogen on the distribution network and planning mitigations and developing solutions to aid conversion from natural gas to hydrogen.

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NIA 292 – Domestic Hydrogen Detector Sensor (H2GO)

This NIC project aims to create a hydrogen detector which will raise an alarm in the case of a hydrogen gas escape.

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NIA 275 – Hydrogen Compatibility of Services

This NIA project is focused on reviewing the service connections from the distribution pipework to the ECV, including modelling the hydrogen demand for various pipe diameters and lengths.

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NIA 276 – Hydrogen Compatibility of Components

This NIA is focused on researching the compatibility of materials with hydrogen, reviewing the current literature and co-ordinating with the H100, Future LTS and HyDeploy projects.

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NIA 269 – Industrial and Commercial Customers

This NIA project is focused on collating industrial and commercial data for NGN and Cadent networks to identify and understand mitigations required to convert industrial and commercial customers from natural gas to hydrogen.

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Completed Projects

H21 NIC – Phase 1

Now a £10.3 million collaborative gas industry programme, the H21 NIC work will deliver the quantified safety evidence necessary to inform a government policy decision on hydrogen for use in the existing gas network.

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H21 Field Trials/Phase 2 Enabler

Once funding is secured, this will involve essential field trials on a decommissioned part of the NGN network, in order to provide the critical pieces of evidence supporting the knowledge from Phases 1a and 1b. Testing will deliver the evidence required to progress to live trials.

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H21 Social Science Research

Public perceptions of hydrogen are currently only guessed at by the research and industry community. As a result, we have no idea about how communities and individuals would respond to the prospect of a 100% hydrogen conversion, which could change the look and feel of daily core practices e.g. cooking and heating.

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H21 North of England

Developed in partnership with global energy giant Equinor and UK gas distributer Cadent, this project builds on the original Leeds City Gate, presenting a conceptual design for converting the North of England to hydrogen between 2028 and 2035.

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H21 Strategic Modelling – Major Urban Centres

This project seeks to extend the principle of hydrogen conversion as established in the Leeds City Gate, across key UK urban centres.

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H21 Keighley and Spadeadam

The primary focus of this project was to understand what was required at the NIC Phase 1a and 1b test sites. It also ensured the designs had a level of independent assurance, providing confidence in effective test execution.

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H21 Domestic and Commercial Metering

This project will determine the suitability of existing domestic and commercial meters for operation on a hydrogen network.

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H21 Leeds City Gate

Using England’s fourth largest city as a blueprint, this pioneering feasibility study, led by Northern Gas Networks, confirmed that conversion of the UK gas network to 100% hydrogen was both technically possible and could be delivered at a realistic cost.

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Partners of H21