Simon Morgan, who spent six years working for the Royal Protection Department, said that the officers followed the “gold standard”.He said: “Lots of other forces’ both in the UK and internationally come to the Met to look at how they do protection and protection driving in particular.“Convoys don’t tend to move that quickly and in urban areas they would generally travel below the speed limit.” Royal protection policies will be looked at in the wake of crash which saw an 83-year-old grandmother hospitalised by the Duke and Duchess of Cambridge’s convoy.Irene Mayor was on Wednesday undergoing major surgery after being hit by a police outrider said to have been travelling on the wrong side of the road in front of a Range Rover carrying the Royals.The Duke and Duchess are “deeply concerned and saddened” by the accident and are hoping to visit Mrs Mayor in hospital in person.The widow’s family have now called for a review of safety surrounding the travel arrangements for the Royal Family.Her sister, Joyce Shore said that she “could so easily have been killed”.The crash, the fourth involving members of the Royal Family in the past seven months, is being investigated by the Independent Office for Police Conduct.Investigators will look at the Royal protection policies which the Special Escort Group officer was following when the accident took place, it is understood. The Duke and Duchess of Cambridge at Royal Ascot yesterday Mrs Mayor, who is an active member of her local non-conformist church, is a widow and lives with her daughter Fiona. Her family were at her bedside last night.Mrs Shore told the Telegraph: “She is stable, they are keeping her stable and she hasn’t spoken to anyone yet so we don’t know exactly what happened. Mrs Mayor had been shopping and was returning to her home in Richmond, south west London, at lunchtime on Monday when she was hit by the marked police motorcycle which witnesses say was driving on the wrong side of the road. The Duke of Cambridge visited a training session of the London Air Ambulance in January “I am more concerned about my sister than anything else.”She said that there should be a review of the safety surrounding Royal convoys.“We are not the first ones that this has happened to,” she said. “There was the crash with Prince Philip. This time it was the police officer that was involved, but they should be doing something.”The Duke of Edinburgh surrendered his driving licence after overturning his Land Rover in a crash in January and last week the the Duke of Kent was reported to have been involved in a car crash with a student in Brighton.In March a convoy believed to be carrying the Countess of Wessex hit another car in Birmingham.An IOPC spokesman said: “If during an investigation we come across information that we feel that we should flag to either the college of policing or to the force, for example that they are putting people at risk or their might be a problem, then we will do that.”If a recommendation is made it will be down to the Metropolitan Police or the College of Policing to change the policies.A Scotland Yard spokesman said that it could not comment as an investigation was on-going. One pedestrian who went to her aid said: “The outrider was not going fast but the lady stepped out and was clipped by the bike’s wing mirror. She went spinning to the ground and was left with a severe cut to the back of her head.”Onlookers said that the police officer looked “grey and shocked”. He is currently assisting the IOPC as a witness.The car carrying the Duke and Duchess’ to the Garter Day ceremony at Windsor did not stop at the scene, in line with security policies, and the couple were unaware of the accident until they arrived. They have sent flowers and a hand written note to the family.It is believed that the Duke will also write to medical staff who attended that scene.One of the Air Ambulance doctors had already met Prince William, having been photographed with him in January when the Duke attended a training exercise of the London Air Ambulance charity, of which he is a patron. Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings.