Greggs feels the heat as shoppers shun pastries in hot June

Greggs says the impact of the heatwave to date means it expects full-year operating profits to be ‘modestly below’ the level achieved last year. Photograph: Jonathan Brady/PA

The UK’s biggest bakery chain, Greggs, has said last month’s heatwave harmed its sales and profits as customers went off the idea of hot pastries in the unusually high temperatures.

Shares in Greggs slumped almost 13% as investors reacted to the profit warning a day after the UK experienced the hottest day of the year so far, with temperatures reaching almost 35C. ​​