a plea for help from the London contingent:

soon, it is my friend's birthday, who is currently at uni in london. I can't make her official birthday do, so I promised to go up for a day (a friday, if you're interested). I want to treat he, partly for her birthday and partly because she is one of my bestest friends EVAH. But money is an issue - are there any fun and cheap places to have a daytrip in london? I was thinking somewhere tourtisy, possibly, as she's unlikely to have done that stuff yet, having only live there a few weeks.

Many thanks!

And yes, I di plan to take her on one of those annoying open top red buses :)