London ftw!
I was there earlier this year.. somewhere in February
First time there and I loved it.
You should just go to try and see all the standard stuff like the Big Ben etc. xD.. figure out which things are close to eachother because me and my friend wasted a lot of time racing around on the tube to find we were near point x a day before as well and *blah blah* so..

Madame T. (the waxified persons thing) is not worth the trouble. I went there in Amsterdam once and it was like... oh.. is this all? xD waste of money in my opinion.
The London Dungeons though was VERY impressive!.. When you go there though, make sure you already have a ticket and that you go early on the day.. like make sure you're there before it's opened.. makes a big difference in the time you spend waiting.
Notting hill is awesome to go see

really cute.
Don't go to Tooting -.-' (At the very end of the black line.. forgot the name)
Anyway yea just... see as much as you can.. it's so worth it

One of the nicest big cities I've ever visited

sorry if this post has ended up being beyond regular proportions but I can't help it :p
ps Oh and and and CAMDEN!!!!!!