Another correction to the above book. Beaufort L4468 was actually lost on 20 Dec 39 (manufacturer's test flight, pilot killed). It was not SOC until 23 Apr 40, which is presumably from where the date listed in the book is derived.
My 1979 edition lists L2099 as serving only with 601 Sqn and "Crashed in forced landing near Middle Wallop 1.6.40" However, the 601 Sqn ORB records that the aircraft "suffered extensive damage", ie was not a total loss. It was indeed repaired, as it served with 303 Sqn as RF-O from 9.9.40, and was still with squadron in 11.40 at Leconfield. What was its final fate please?