Enel already held 60% of the holding company, which held a majority stake in the plant near Stara Zagora, in south-eastern Bulgaria, which it bought from Entergy in 2003.

Fulvio Conti, Enel chief executive, remarked: “The increase in our stake in Maritza East III strengthens our position in Bulgaria, a key market for Enel’s growth in Central and Eastern Europe, where we intend to expand further, both in generation and power infrastructure.”

The remaining 27% of both Bulgarian companies is still owned by NEK, the Bulgarian national electricity company.