In March 1942 the fourth Troop of each Battery was removed and constituted into a new 466th LAA Bty; this was mainly composed of men of low medical categories.
In November, after completion of this training, 73rd LAA Rgt was assigned to 71st AA Brigade in Kent, where it deployed to some of the most heavily-attacked towns in the UK: 218 Bty at Dover, 221 Bty at Minster-in-Thanet, and 296 Bty at Deal, with RHQ at Shepherdswell.