The rescue of an injured horse rider was delayed when an air ambulance was ordered off the property of Sheikh Mohammed Al Maktoum.

The Sheikh, who has an estimated fortune of £9billion and is married to International Equestrian Federation (FEI) president Princess Haya of Jordan, keeps tight security at his £75million Longcross House Estate in Surrey for the protection of his family.

The air ambulance crew had landed and were about the cut through the 6ft security fencing to reach the injured rider on the neighbouring Chobham Common, when they were stopped by the Sheikh’s security guards.

According to the Mail on Sunday, the crew were told they had to take off and reland somewhere else — resulting in a 20-minute delay in reaching the unconscious woman, who had fallen off and landed on her head.

The woman was already being attended to by paramedics on the ground before being airlifted to hospital. She has since been discharged.