Overview: 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)