Metropolitan Police Chief Superintendent Sean Wilson updates the media at the scene near Cayton Road in Greenford, west London, where Thomas O'Halloran, 87, who had been riding a mobility scooter, was stabbed to death.

Metropolitan Police Chief Superintendent Sean Wilson updates the media at the scene near Cayton Road in Greenford, west London, where Thomas O'Halloran, 87, who had been riding a mobility scooter, was stabbed to death.