Former army helicopter pilot Rosie preps another epic design: a three-foot-long cake to look part dragon, and part boat, decorated in 25 kilos of intricately sculpted fondant and edible paint. Meanwhile in London, fashionista turned cake maker Nastassja, takes on one of her most challenging cakes to date: an intricately decorated time piece cake with two tiers, each with a hollowed out clock face, adorned in roman numerals representing the birthday girl's date of birth. In Dunstable, Karisha faces a tricky balancing act with a floating tiered cake. Built on a massive two-foot wide vanilla cake base, the four-foot high creation gives the illusion of floating tiers, with see-through separators, carefully disguised with over 500 handmade sugar paste flowers. But an accident during delivery tests all her skills to avoid disaster.