In May 1940 55th Div Defence scheme states that No 16 Army Co-operation squadron operating from advanced landing grounds would provide close air support. In 1940 RAF bombers from Wattisham medium bomber Station, Honington heavy bomber Station and Stadishall heavy bomber Station would have attacked in support of XI Corps. Communication between air and ground was to be by ground strip signals. A direct line also provided between HQ 55th Div and HQ No 2 Bomber Group. If bombers were to act in support of the division a car would be sent to Wattisham to pick up a RAF liaison Officer.
From July onwards No 2 Army Co-operation Squadron would keep two tactical reconnaissance sorties at the disposal of 55th (and later 42nd Div) at half an hours notice during the hours of daylight. During the phase before the direction of enemy attack was known, all planes from No 2 Squadron (less those on sorties) would be available for bombing support at three hours notice.
Above: Lysanders - Army Co-operation squadron
In 1941 bomber targets were arranged between G.H.Q Home Forces and Bomber Command. This was to provide a system of quick reference to a number of tactically important points easily recognizable from the air and also likely to provide effective targets for air attack. Intermediate targets could be described by reference to these targets or by normal map reference. Any call for air support would be made through the relevant sub-sector H.Q quoting the appropriate reference.
Above: Bomber targets, Suffolk 1941
Air Ministry papers on invasion, TNA
45 Brigade papers, TNA