[2] Vandeleur was commissioned into the Irish Guards as a second lieutenant in 1924, serving in Sudan and Egypt before the war.

[2] As commanding officer of the 3rd Battalion, Irish Guards,[2] he led the breakout of XXX Corps during Operation Market Garden.

His second cousin Lieutenant-Colonel Giles Vandeleur (their grandfathers were brothers) was acting commanding officer of the 2nd Armoured Battalion, Irish Guards.

[2] Vandeleur acted as a military consultant to the production of the 1977 feature film A Bridge Too Far.

[6] After the war, Vandeleur resided in a manor house in Pinkneys Green, near Maidenhead in Berkshire.