By Nina Chestney

LONDON, July 8 (Reuters) – French power company EDF and the British government have signed an agreement to extend the ‌life of the Sizewell B nuclear power plant in Suffolk, England, ‌by 20 years to 2055, they said on Wednesday.

• The 1.2-gigawatt plant was commissioned in ​1995 and was due to stop generating in 2035. That has been extended by 20 years.

• EDF and the government signed a contract for difference (CfD) agreement to extend the plant’s life. Sizewell B will receive a guaranteed £70.50 ‌per megawatt-hour from April 2035 ⁠to March 2055 for the electricity it produces based on 2025 prices.

• A nuclear CfD guarantees a strike price ⁠for power output. When market prices are lower, consumers make up the difference and when prices are higher, the generator pays the excess back.

• The scheme ​aims ​to give low-carbon projects a predictable source ​of income.

• EDF said it ‌will fund a major refurbishment of the plant during planned outages over the next 15 years, costing around £800 million ($1.07 billion).

• Sizewell B provides around 3% of the UK’s total electricity needs. The extension will ensure 2.5 million homes are powered and protect consumers from exposure to volatile fossil fuel ‌markets, the government said in a statement.

• ​Many UK nuclear reactors have already shut ​down and others have had ​life extensions to the end of this decade. A ‌new plant, Hinkley Point C, has ​had repeated delays and ​rising costs. The first reactor is now expected to start up around 2030. The other new plant, Sizewell C, won project approval ​last year after securing ‌investment.

• British energy firm Centrica has a 20% stake in ​Britain’s operational nuclear fleet, which consists of five plants.

($1 = 0.7492 pounds)

(Reporting ​by Nina Chestney;Editing by Elaine Hardcastle)