EU anti-trust regulators on Thursday cleared a partnership between French power company EDF and Chinese nuclear firm CGN to build nuclear power plants in Britain, including the controversial Hinkley Point project.

Hinkley Point, which EDF will build in partnership with CGN, will be Britain's first nuclear power plant in decades and one of the world's most expensive, with a projected cost of £18 billion (23.2 billion euros, $25.5 billion).

"The Commission's investigation found that competition in the wholesale supply of electricity in the UK will not be hindered by the transaction given the moderate market share of EDF, the very limited market shares of CGN in this market and the presence of other competitors," the European Commission said in an email sent to AFP.

The decision comes just days after the shock resignation of EDF's finance chief which sparked heightened concerns over the financial viability of the Hinkley Point C project in Somerset, southwest England.

Hinkley Point is to provide seven percent of Britain's energy needs by 2025.

EDF has yet to give its final green-light to the enormous project, but French President Francois Hollande and British Prime Minister David Cameron pledged their support for the project at a summit last week.

EDF is 84.5-percent owned by the French state.

In a contested decision in 2014, the European Union already approved the project's complicated funding, sidelining concerns about whether aspects of the deal amounted to state subsidies.

The project encountered fierce resistance from activists and several member states at the time, but a vote by the bloc's 28 commissioners narrowly backed the deal.