I'll be staying in London for about a week, starting next Tuesday, to visit a friend who's trying to settle there. Since he hasn't been in London for long yet, I don't think he'll be able to play the guide part, and a week can be pretty long if you don't have stuff to do on daytime but sit on your ass at the local pub.
I already went there, but I was like 12 so I don't remember much, if anything at all. So I thought I'd just ask here, as there seems to be many europeans browsing these boards, hoping someone who lives in London or has ever been there can advice me some cool stuff to do, visit, whatever.
Thanks in advance!