Wedding in London

Yup, my nephew is marrying and the wedding is in London. The entire family except my younger sister is going over to celebrate. It's only for the weekend, so there will be no time to meet up with anyone or do anything touristy. Hubby is partially sulky because in his opinion it is a weekend spent in agony and pain having to be sociable, polite and nicely dressed :P I'm sure it'll be a nice trip all the same, I am certainly looking forward to two days in luxury with a proper European-style breakfasts etc in a rather posh hotel ...okay and now back to packing. I very nearly forgot to get a passport for my son. I can only cross fingers there isn't anything else VERY important I've forgotten =/