British Prime Minister Rishi Sunak has carried out a sweeping shake-up of Whitehall with the creation of four new government departments aimed at boosting economic growth and addressing the energy crisis.

He replaced sacked Tory party chairman Nadhim Zahawi with Greg Hands, who had been trade minister.

But the main element of the reshuffle saw the business, trade and culture departments restructured into four different ministries.

Grant Shapps, who had been business secretary, will now be the Energy Security and Net Zero Secretary.

Kemi Badenoch, who was international trade secretary, will now lead the joint Department for Business and Trade.

Lucy Frazer joins the Cabinet as Culture Secretary in a department which has been shorn of its responsibility for digital technology, but will instead focus on the creative arts and sport.

Michelle Donelan moves from culture to the new Department for Science, Innovation and Technology.

Downing Street downplayed questions about how expensive the reshuffle and reorganisation of Whitehall departments might be.

The Liberal Democrats claimed that the reforms could cost £60m (€67m).

The prime minister's official spokesman, asked about costs, said details would be set out in the normal way.

"It's worth stressing obviously the teams are already in place.

"This is about bringing together teams under the priorities of the prime minister. So we wouldn't expect there to be significant additional costs to this."

The spokesman said he did not recognise the figure suggested by the Lib Dems.