he ASC MT Companies attached to the Royal Garrison Artillery as Ammunition Columns / Parks

The heavy guns and howitzers of the RGA, with attendant equipment and ammunition, needed motorised transport to haul them. The MT Companies called Ammunition Parks operated dumps, or stores, of ammunition. The larger calibres of artillery shells required special mechanical handling equipment. All served in France unless otherwise mentioned.
Formed April 1917 but absorbed on 1 May 1917. For 317 Siege Battery at home.