New Great British Bake Off presenter Prue Leith has urged shoppers to back British farming in response to the National Farmers’ Union’s (NFU’s) new supermarket guide.

The guide shows eight major retailers are backing British baking by sourcing 100% of their flour, butter and eggs from domestic producers.

Leith, who is a long-term supporter of the NFU’s campaign, Back British Farming, said: “UK butter, flour and eggs are all easily available and choosing them really helps our fantastic farmers. So let’s make the effort to buy British.”

The UK’s four largest retailers - Tesco, Sainsbury’s, Asda and Morrisons - are joined by The Co-op, Waitrose, Lidl and Marks & Spencer in demonstrating their commitment to British baking by giving shoppers the choice of home-grown flour, butter and eggs to use in their baked goods.

NFU president Meurig Raymond said it was fantastic to see more retailers than ever backing British farming and supporting its farmers produce on the shelves.

“We know shoppers want to buy more British produce and the aim of our supermarket guide is to give them the information they need to do that,” Raymond said.

“I’m sure the public will be delighted to know that retailers are giving them the opportunity to buy more British products by getting behind the nation’s farmers.”

A survey carried out by Waitrose has shown that 19% of people say they now bake at least once a week and nearly half bake more than they did five years ago.