From birthday cakes to traditional wedding cakes, Simon King and Dave Myers delve into the world of celebration cakes and face their biggest challenge to date - making a five-tier wedding cake.The Hairies journey to Manchester to meet Helen and Jonnie, the couple who are prepared to let them loose on their wedding cake. The boys decide to bake a traditional fruit cake with a Hairy Bikers twist, using quantities of ingredients so large the cake has to be mixed in a wheelbarrow.This is a 14 minute edit of Season 4, Episode 4 (Celebration Cakes)