built as part of Sir Hugh Trenchard’s 1920s Home Defence Expansion Scheme
There were two "Expansion" periods. I understood that we were discussing the period 1934 - 1938 which was the second period of expansion (and much the largest). There was a smaller previous expansion in 1926 following the Conservative victory in the General Election. To save money, the expansion included the new Special Reserve (500 series) and Auxilliary (600 series) squadrons of part-timers.
RAF Waddington reopened at this time (having been closed in 1920) and a new Officers Mess "Newall House" (now the Creche and Hive) was built. The Station was completely re-designed in 1936-7 when the current mess and domestic site layout took over from the WW1 buildings on site. (WW1 buildings were demolished in 1943 when the runways were concreted).