I'm really happy how this turned out, but I am going to practice my writing some more. A friend of mine who worked in Thorntons has given me some great tips.
The next cake is a little bit different from your average birthday affair. My friend at work wanted to give her a son an extra special cake to commemorate not just his 21st birthday but also him graduating university after studying History. His dissertation was on Stalin so she thought up having a Communist cake:
It's a Black Russian cake (basically chocolate with a lot of vodka and coffee liqueur) with red buttercream icing and yellow fondant decoration. On the side it reads 'HAPPY BIRTHDAY COMRADE'. Thankfully he found it as funny as his mother did and they said it was very tasty.