'Last' was an Allied one of several training exercises in preparation for 'Overlord', in this instance for formation and unit headquarters (mid-April 1944).
'Last' was a signals exercise involving Lieutenant General G. G. Simonds’s Canadian II Corps of General H. D. G. Crerar’s Canadian 1st Army, and was designed to practise headquarters (down to and including the unit level) in the passing of information and conducting the operations involved in breaking out of a bridgehead.