Does anyone know where to buy a SpongeBob Squarepants birthday cake in London please?!

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tesco sell one for ￡9.50. if you go in a week before and they don't have one they may be able to get one in for you.

Try the supermarket... Sainsburys, Tescos, etc.

I don't know if they still do it, but Sainsburys used to make a cake for you as you wanted it. You could even have a photo you had taken put onto it. Quite edible, not the actural photo.