Dark chocolate is the new twist on a savoury pretzel snack from The Big Yum. The original milk chocolate-covered variant was launched in March 2010, but its success in retailers such as Harrods and Selfridges encouraged co-founders Pippa & Aaron Witcher to launch their Dark Chocolate Swerves eight months ahead of schedule.

The 70% dark chocolate version comes in 70g bags (£1.80) and 250g bags (£4) and is now being trialled in Puccino’s and Costa Coffee shops. Said Pippa: "The mix of chocolate and salty centres has won favour among both the savoury and sweet snacking fraternity and enabled pretzels to escape their dull persona."