Sir Anthony addressed the assembled student body at Harrow, not Eton.
The episode correctly shows Israeli Sherman tanks which were used by their troops alongside the French AMX 13 however it incorrectly shows the British using a Crusader Mk3 which in reality had been withdrawn from service over a decade earlier, the British forces actually used the Centurion tank.
Opening sequence shows a Nikon F camera in 1957, but that camera wasn't introduced until 1959.