Pret A Manger is to extend its Veggie Pret pop up shop on Broadwick Street, Soho, for the rest of the summer after positive feedback from customers.

Earlier this month, Pret chief executive Clive Schlee said sales at the trial site had increased by more than 70% on last year.

On the next steps for the concept, he said: “It’s early days, and we are having a big internal debate about this. The original idea was to close the shop after four weeks, but we are now inclined to keep it open slightly longer to see whether demand is still as strong once the initial hype dies down. There are some who would like to convert every fourth Pret into a Veggie Pret, and to explore its success in other markets too.”