Champion jumps jockey Tony McCoy will take a brief rest from breaking records when he takes on former eventing world champion Zara Phillips in a special race at the Barbury International horse trials.

The JCB Champions Challenge on July 5 is a star-studded charity equine event, where jockeys, eventers and show jumpers will compete in teams over a specially designed course, including a water jump, in the main arena.

Phillips, who is the Queen's granddaughter, has a strong team which boasts the highly-decorated trio of William Fox-Pitt, Sir Mark Todd and Laura Collett.

McCoy, who recently completed his quickest half-century of winners, will be alongside John Francome and Sam Twiston-Davies.

The event will support the Injured Jockeys' Fund.