Ok, you need to head for the 'EXIT' signs. There is a toilet on your right as you walk out, theres a big opening that leads to the outside. Don't go down any stairs or you'll end up on the road rather than the walkway you wanna be at. There's a British transport Police office next to the opening you wanna go out. It's a raised walkway which is exposed for a few meters, then goes covered for a few meters (expect a beggar in the covered bit), then opens up again. There are steps on your left. Ignore them and carry on walking straight. There's a large drop to your left, which is the bit people are talking about when refering to 'Shell/Shell centre'. The London Eye is in the 10 o' clock position infront of you. The walkway goes over a road. To your left is a load of sloped walls which is where everyone will be. Keep walking straight and you'll end up going down some stairs. Head towards the sloped walls you saw from the walkway. You're there That may sound complicated, its really not, just trying to give as much detail as possible Good luck!