Between October 2014 and January 2019, KDK Archaeology Ltd undertook a programme of Historic Building Recording, Strip Map and Sample Excavation (Areas 1 and 2) and Archaeological Observation and Recording of De Havilland Aircraft Museum. This was done as a condition of the planning permission for the development of the site. Sub-surface investigations revealed no archaeological finds, features or deposits that predated the Second World War. The remnant foundations of a potential WWII Mosquito hangar were exposed in Area 2 and service pipes and cables were commonly encountered during the archaeological investigations. However, the entire area investigated was predominantly covered in made-ground (including tarmac and concrete). Consequently, the local stratigraphy had been comprehensively truncated and re-worked from the mid-20th century onwards.