Media playback is unsupported on your device

Mayor jumps on horse to welcome show jumping to London

7 May 2013 Last updated at 13:39 BST

London's Mayor Boris Johnson helped launch the Longines Global Champions Tour London which will be held next month near the Olympic Park.

This is the first time the world's leading show jumping championships will be in the UK and to mark the launch the mayor jumped on to a horse and described it as "superb".