Dan Lacey trials the Boris Bike in London

Dan Lacey, professional BMX rider, takes one of the Mayor of London's new for-hire bikes for a spin around the capital.

The British rider, who has recently returned from the 2010 X-Games in Los Angeles, found the going tougher than he expected.

The design and, more significantly, the weight of the bike meant that he was not able to pull off the more spectacular tricks he is accustomed to performing at major events around the world.

His efforts were thwarted by a bicycle which he described as being "built like a tank".