The sandwich chain now has 274 branches in the capital. How did it grow so huge – and can anything stop it getting even bigger?

At 93-95 Victoria Street, Westminster, a blue plaque marks a piece of London history: the first ever branch of Pret a Manger opened on this spot on 22 July 1986. Nearly 40 years later, it is still going strong.

It’s a nice story – but it’s not the whole story. Look closer and the plaque states that the first Pret sandwich shop opened “near here”. In fact, it was down the road, at 75b, now a branch of Toni & Guy. Except … that wasn’t the first shop, either. The original Pret opened two years earlier and five miles to the north, in Hampstead. It went bust after a year and the founder, Jeffrey Hyman, sold the name, branding and logo to Julian Metcalfe and Sinclair Beecham, who reopened in Westminster.