The wearing of black overalls is a custom reserved to the Regiment by Material Regulations for the Army, volume 3, Pamphlet No 4 (Code 13251). It stems from the Royal Review held at Aldershot in the presence of King George V on 13 July 1935 on which occasion black overalls were worn on parade by all ranks of the Royal Tanks Corps. The practice lapsed during World War II but was re-introduced in the 1950s.