Under the agreement signed with Network Rail, EDF Energy will supply about 3.2TWh of electricity per year to power a network which carries over three million passengers a day.

Network Rail chief executive David Higgins stated that the partnership with EDF Energy will make rail a greener form of public transport in Britain.

"This innovative contract for low-carbon energy will provide excellent value to the rail industry and means we are not only providing a greener railway, but also a better value railway for Britain," Higgins added.

"Our work to electrify hundreds of miles of railway represents the biggest programme of rail electrification in a generation and will provide faster, quieter and more reliable journeys for millions of passengers every week while cutting the cost of the railway."

Commenting on the latest long-term deal, EDF Energy CEO Vincent de Rivaz said that it is "a massive vote of confidence" in the firm’s nuclear-backed energy.

"The deal places nuclear energy at the heart of the UK’s infrastructure for the next 10 years and serves to underline that nuclear power is part of everyday life in Britain," de Rivaz added.