This is the first picture of an elderly woman who was knocked down by Prince William and Kate Middleton's motorcade yesterday.

Irene Mayor, 83, was 'clipped' by a police motorcycle in the royal couple's motorcade, leaving her in hospital with serious injuries reportedly including a broken pelvis and a gash on the back of her head.

The widow was trying to cross the road when she was clipped by the bike which was "not going very fast", according to one witness, on a busy road in East Sheen, an affluent suburb in south-west London.  

The Duke and Duchess of Cambridge have sent flowers to Mrs Mayor - who was on her way home from shopping - and have offered to visit her in hospital if she is up for it.

Local residents claimed the police outrider was driving on the wrong side of the road with flashing lights when he collided with Mrs Mayor just before 1pm on Monday.

The Cambridges were on their way to join the Queen at the Order of the Garter ceremony at Windsor Castle when the accident happened (
Image:
SIPA USA/PA Images)

The officer was part of William and Kate's security team while they were on their way to join the Queen at the Order of the Garter ceremony at Windsor Castle.

It is the fourth collision involving a Royal Family member in seven months.

There was no indication that speed was a factor, but in an interview, her sister Joyce Shore told MailOnline: "The police outriders have to slow down.

"My sister is lying in a hospital bed and she could have been killed. She could so easily have been killed."

She tearfully added: "Irene may not get through this."

The pensioner was struck by a motorcade in south-west London (
Image:
Supplied by Ian Vogler)

Ms Shore said her sister is still active at 83 and does her own shopping, and is involved at her local non-conformist church.

Local residents described the road as "dangerous" and complained about the speed of passing cars.

Mrs Mayor's daughter Fiona, who lives with her mum just 300 yards from the collision scene, had earlier told the Sun: “She’s got lots of injuries. They are just keeping her stable at the moment.”

Locals rushed to Mrs Mayor's aid - bringing towels and blankets - as she lay injured and bloodied in the road in Richmond. She had stepped off a bus moments earlier.

A photo taken after the collision shows the bike on its side in the wrong lane of traffic at a pedestrian crossing.

A number of emergency vehicles were present at the scene (
Image:
Simon Banks/The Sun)

The motorcyclist was in shock and waited at the scene, the witness added.

An air ambulance landed close to the scene.

Another local, a woman in her 80s, said of Mrs Mayor: “She was on the ground not moving at all, I thought she that looked very still.

“My first reaction was to cover my eyes, it was just an awful situation.

“There was lots of people, with a couple of the members of the public trying to stop the traffic.

“A man stood in the road and put his arms up, while others leaned down and put her in the recovery position.

“The lady was faced away from me, but I could see about eight people, including a police officer wearing black.

The accident scene on Upper Richmond Road in East Sheen, south-west London (
Image:
Simon Banks/The Sun)

“The police bike was parked by the side of the road, but I had to drive on."

She added: “They’ve put all sand down in the road where it happened now, this is not long after another crash, people drive too fast here.

“Us locals think it happened because of the closure of Hammersmith Bridge - why else would they travel this way to Windsor, it is unusual.”

Neighbours described the church-going widow as an “extremely thoughtful” woman.

Giles Oakley, 73, said: “I know her well enough to say she’s a really sweet person, she’s very well liked.

“We’re very upset, it’s very sad and I hope that she recovers.

“We were contacted by a neighbour straight away, that’s the kind of standing that Irene has here.

The woman was struck on this busy route

“She’s very kind and extremely thoughtful.

“I didn’t know what happened until yesterday, but it was a very bad accident and there was an air ambulance.

“We’re very protective of Irene and we don’t want too much intrusion.”

Will and Kate were "deeply concerned and saddened" and have been in touch with the injured pensioner's family, according to Kensington Palace.

The royal couple have sent flowers with a handwritten note and have told Mrs Mayor's daughter Fiona that they would like to visit the grandmother if she is willing to see them.

A member of their staff visited Fiona on Tuesday.

It is understood the Duke and Duchess did not witness the collision and weren't told of it until after the convoy arrived in Windsor, where they attended the event without children Prince George, five, Princess Charlotte, four, and Prince Louis, one.

Will, 36, and Kate, 37, were in a Range Rover which followed security protocol and did not stop after Mrs Mayor was hit.

Royal protocol calls for the motorcade to drive on if there is a collision or incident.