We took the cable car at the O2 (Millenium Dome). Cannot believe the exceptional views of London especially with the sun was going down (approx 4.45 pm) - absolutely magical! We took the round trip with friends who have all lived in London for over 40 years and were ALL speechless!! Something everyone should do. Amazing to see the contours of the Thames. The only downside was the frustratingly long wait for tickets - more staff needed as the machines couldn't accomodate Freedom Passes which enable holders to have a price reduction. Then took the Clipper (River Boat) back to London Bridge rather than take the Tube.