The convoy carrying Prince William and his wife Kate hit an 83-year-old woman leaving her in a serious condition in a hospital.
The royal couple was travelling from central London to Windsor when a police motorbike in the convoy collided with the pensioner, Irene, on Wednesday.
Kensington Palace said they were concerned and saddened and had contacted the woman and will stay in touch throughout her recovery.
The woman is in a serious condition.