This was up on groupon for £75 the other day. I've passed it a couple of times and it's seemed to be full each time so I guess they managed to sell some tickets. They've set it up on Wood Wharf so your view west is just of the office blocks of Canary Wharf rather then into the city. I guess you'd maybe see the Olympic park, Greenwich and the Millennium Dome but it isn't all that high - 5 stories at most I'd say so you'd get a better view in any of the surrounding buildings.

