In October, it left for practice camp in Cornwall, and thence to France, where it joined the British Expeditionary Force before Christmas. Following the German invasion of the Low Countries on 10 May 1940, all units were soon in action, but the fortunes of war resulted in evacuation from Dunkirk, Cherbourg, Saint-Malo and other ports during late May and early June. One troop successfully brought back four of its 3.7-inch Anti Aircraft guns and some vital gunnery instruments, despite having orders to blow them up. Back in England, the regiment was soon in action again during the Battle of Britain and the Blitz, first in Coventry, unit then ordered to London (Clapham Common) three days before Coventry was blitzed, the units road convoy took two hours to pass Green Road Roundabout on the outskirts of Oxford, such was its size, London and then on Teesside.