August 04, 2025 [Uniper]- Uniper is exploring the potential development of a salt cavern hydrogen storage facility, near Warmingham in Cheshire, in partnership with British Salt, who own the mineral rights and have existing operations on the site.

The two companies have recently signed a feasibility development agreement which gives Uniper the sole rights to explore the site’s potential for hydrogen storage. British Salt will add steps to its existing solution mining plans to support Uniper in gathering data with the aim of evaluating the site’s potential for hydrogen storage.

Hydrogen is a key fuel for industries that are difficult to electrify, such as chemicals and refining, steelmaking, cement production, and transport. The UK has a geology that is highly favourable for salt cavern gas storage which would be able to significantly contribute to the large-scale seasonal and daily flexibility needs of the UK’s future energy system.

The companies will work together to develop designs for the drilling of the first two wells so that they are suitable for the potential development of hydrogen storage caverns. Development of the Salinae Hydrogen Storage project will be subject to Uniper being granted Development Consent Order planning approval and in the absence of a hydrogen market, and as a precursor to a competitive market framework, Uniper will also need UK Government to develop a bespoke business model to bring forward this first of a kind technology.

Uniper’s existing gas storage facility, and any potential future hydrogen storage facility, play a key role in ensuring a secure and flexible energy system in the UK.