Colin the Caterpillar taste test: Which supermarket does the best cake?

Chocolate caterpillar cakes are a familiar sight at birthday parties and office parties across the land, but is Marks & Spencer’s Colin the stand-out favourite? Subscribe to The Telegraph on YouTube ► We put Colin, as well as other critters including Curly, Wiggles and Carl the gluten-free caterpillar, to the taste test to see which creature comes out top.