When we get to Mexico, I really don't want to waste the whole first day buying shampoo like we did in Ibiza.

So I'm all prepared. I've read the Rough Guide, bought insurance, recharged my camera battery and made a checklist of everything to keep with me on the plane.

Gem, of course, is going to throw everything into her bag the night before. She's bound to get annoyed when I read her my checklist, but if I don't our first experience of Mexico City may be scouring the tiendas for deodorant.