I will be flying in late on Tuesday and leaving late afternoon on Thursday, so I will have part of Thursday and most of Wednesday to explore. I am having lunch with a friend on Thursday and am spending the later parts of Wednesday evening with another friend, so what I am mostly looking for are things to do for most of the day on Wednesday and early Thursday.
I have been to London before so I have seen most of the main touristy sites, and though of course there are pleeeeenty left, I am hoping for more "alternative" (and preferably cheap) ideas since I would like to do the touristy things with friends.
Any suggestions are welcome! :)