Suggestions for non typical touristy things in London?

[TomCat84]

I know we have a large London/UK contingent here, and Im coming for Pride this year. Any suggestions on some relatively off the beaten path stuff to do in the city? Also, guides would be appreciated (and no, this isnt a personals ad). Cheers!

 

[Petrolhead]

where do I start?... What sort of things are you into, that might help direct you better. You certainly won't be short of things to do!