What was most striking about the first one was that it bore a proper character name. Apparently, unlike any other food I can think of offhand, some of the other caterpillar cakes do too. I'm bemused that it's semi-necessary to give a cake a proper name.
Tesco: Curly the Caterpillar Cake
M&S: Colin the Caterpillar Cake
Sainsbury: Wiggles the Caterpillar Cake
ASDA Caterpillar Cake
Waitrose Caterpillar Cake
Any others? (I couldn't resolve Morrisons or Booths online.)