Anthony McCoy and Rachael Blackmore will lead the teams in the Markel Jockeys Jumping event at the London International Horse Show on Monday.
The competition, which which sees a female and a male team tackle a course of show jumps against the clock, is run in aid of the Injured Jockeys Fund and is in its sixth year.
Blackmore will be joined by jump jockey Bridget Andrews, Joanna Mason, Hayley Turner and Saffie Osborne – a former European gold medallist in eventing at pony level.
