This is something you certainly didn't see every day! 47621 Royal County of Berkshire has QXV inspection saloon DB999506 tucked inside, as it leaves Oxford station on 4 September 1987 with the 1A10 06:04 Hereford to Paddington InterCity service. Hopefully locked to prevent any unsuspecting passengers finding themselves in unfamiliar surroundings, the vehicle was presumably hitching a lift with this train as a convenient way of getting to Old Oak Common.