Network Rail has moved closer to running its offices, depots and 20 managed stations entirely on renewable power after agreeing a Corporate Power Purchase Agreement (CoPPA) with RWE that will provide about 65% of its non-traction electricity from an offshore wind farm.

The five-year agreement will supply 300 GWh of renewable electricity annually and is Network Rail’s second CoPPA within a year.

Power will come from RWE's Gwynt y Môr Offshore Wind Farm, located 15 miles off the North Wales coast in the Irish Sea. The deal is expected to cut the organisation’s carbon emissions by around 168,000 tonnes of CO₂e, which Network Rail equates to planting 6.5 million trees.

The contract supports Network Rail's ambition to source all non-traction electricity used across its offices, depots and managed stations from sustainable energy by 2030.

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Paul Marshall, Network Rail's chief financial officer, said: "This contract marks a significant step forward in our transition to renewable energy. Rail is already one of the most sustainable ways to travel, but we recognise there is much more we can do."

He added: "This agreement with RWE represents a major step towards our ambition to power all our non-traction electricity - across offices, stations and depots - from renewable sources by 2030. It also highlights the important role organisations can play in driving investment in clean energy.

"As we move towards Great British Railways, this deal underlines our commitment to reducing carbon emissions and building a more integrated, sustainable rail network, not just for the millions who rely on it today, but for future generations."

Network Rail said the deal is a key element of its Greener Strategy. It follows a CoPPA signed with EDF Renewables in 2025 for 64 GWh of solar power each year from a new site under construction. Together, the two agreements will provide roughly 80% of the organisation’s non-traction electricity from renewable sources, keeping it on course for the 2030 target.

Gwynt y Môr, commissioned in 2015, comprises 160 turbines with a total capacity of 576 MW. Electricity from the wind farm is scheduled to begin powering Network Rail’s offices, stations and depots from 1 April 2027.