No 1 Aircraft Depot (AD) - St Omer

I had a query regarding the location of 4 Squadron Royal Air Force during the German Spring Offensive in 1918 and determined that the squadron was based at St Omer between the 16th April and the 18th September 1918. St Omer was the home of the British Air Park between October 1914 and May 1918 as well as many of the Royal Air Forces squadrons from time to time. For the interest of anyone who might wish to visit the actual location occupying the present-day racecourse and aerodrome at St Omer I have produced a set of aerial images of the same area, with photographs taken in 1918 and a satellite image (courtesy of Google Maps) taken in 2024 - see attached image.