Thanks BG, your cakes always look great

Bugger Sunlovejoy, I think I did the pictures right! I'm not very good at linking them though so maybe not lol. The blue layers sound great, definitely link a pic when you're done! For the 'ice' shards, I'm going to practice them a couple of weeks before the party, but I gather you get a regular toffee recipe (caster sugar + water), and add the food colouring to the water first then boil. What I saw says to use a candy thermometer and get the temp to 149, then pour it onto a lined tray. When it's set you should be able to break it up. Google should help, and I'll pm you the link from Rose.