Chocolate lovers are in for a real treat this summer, with confectionary giant Cadbury launching a nationwide competition for fans to guess the secret flavours of two new Cadbury Mystery Bars.

The two limited-edition bars each contain a secret flavored filling, with flavour detectives in with the chance of winning a £5,000 mystery prize. However, you're going to have to be a bit of a whizz with your tastebuds.