LONDON, Jan 22 (Reuters) - Britain will invest an extra 1.3 billion pounds ($1.65 billion) in the Sizewell C nuclear power station, the government said on Monday, making it the majority shareholder in the project.

The government said the funding, the largest to date, would allow early construction works to continue before a final investment decision expected later this year.

The plant in south-east England is expected to produce around 3.2 gigawatts of electricity, enough to power around 6 million homes.

($1 = 0.7865 pounds) (Reporting by Muvija M. Editing by Andrew MacAskill)