Sims its totally different to a wagon wheel. Its like tiffin, marshmallow, crunchy biscuits, chunks of marshmallow, cherries and coconut in chocolate and cut into bars.
They sell them in my local Asda (Colchester) but I'm not sure if it's because they are made locally. They are made by the Wicked Cake Company and are just the best (trust me I've tried lots of different brands and nothing comes close)