Many high-street frappés contain more sugar than a Mars bar

Which? finds some Starbucks, Costa Coffee and Caffe Nero coffees contain more sugar than recommended daily allowance

An iced coffee is a cool pick-me-up on a hot day, but it might not be the caffeine boosting your mood as many of the blends sold by well-known high street coffee chains contain more sugar than a Mars bar or can of Coke.

The consumer group Which? looked at the sugar load in frappes and Frappuccinos being served up this summer by three of the biggest coffee chains, Starbucks, Costa Coffee and Caffe Nero, and found many regular" size drinks contained more than an adult's recommended daily allowance.