You should expect people trying to make a lot of money, trying to spread rumours that the Stones will attend. I suppose you're talking about the one in Greenwich, near the O2. If you wanna pay 30 Euros to hang out with other fant, please go ahead, but don't expect the Stones to be there. While in London all four Stones will probably stay in their own respective homes in and close to London. The backing band - in a hotel in Marylebone, as usual.