Conservative MP Michael Fallon (pictured) is set to replace John Hayes as the Energy Minister in what is believed to be part of a mini reshuffle by David Cameron.

Mr Hayes, who was appointed in September last year following the departure of the previous Energy Minister Charles Hendry, will become a political and parliamentary adviser to the Prime Minister.

The formal announcement from Downing Street stated: “The Queen has been pleased to approve the following ministerial appointments: John Hayes MP to become a Minister without Portfolio (Minister of State), Rt Hon Michael Fallon MP to become a Minister of State at the Department of Energy and Climate Change in addition to his current role as a Minister of State at the Department for Business, Innovation and Skills.”

Mr Cameron showed he was pleased when he tweeted this morning: “Delighted John Hayes joining me as a Senior Parliamentary adviser – and Michael Fallon adding a key energy role to his brief.”

Mr Fallon was appointed Minister for Business and Enterprise in September 2012 and has been the Conservative MP for Sevenoaks, Kent since 1997. He was a minister in the Department for Education and Science from 1990 to 1992 and the MP for Darlington for nine years prior to that.