Princess Elizabeth Trains As A.T.S. Officer. Princess Elizabeth smiles as work on engine is complete. Princess Elizabeth who is second subaltern in the A.T.S., is undergoing training at an A.T.S. training centre in Southern England. Recently a visit was paid to the centre by their Majesties the King and Queen and Princess Margaret, who saw training in progress. They were very interested in the motor transport section in which Princess Elizabeth was undergoing instruction and they watched her learning about car maintenance. April 1, 1945. (Photo by British Official Photo).