British Gas owner Centrica has signed a 10-year deal worth more than 20 billion pounds ($27.07 billion) with Norway's Equinor to secure gas supplies starting in 2025, both companies said on Thursday.

Centrica has agreed a £20bn deal to source gas from Norway’s state-owned energy company Equinor, which stipulates that natural gas could be substituted for hydrogen in the years to come.

The agreement starting October and covering the next decade would meet around 10% of the country’s annual gas demand.