Blenheim AZ941 was lost on 2.12.43, not in 1941 (I doubt if it had even been delivered by Dec41). This is confirmed by the CWGC entries for the two crew. A few more details are here: www.hambo.org/lancing/view_man.php?id=371 The aircraft was coded 74, there is a photo of the wreck on Page 85 of "Lincolnshire Air War 1939-1945 Book Two" (S.Finn, 1983).
My file of the AA100-AZ999 file just says 'transferred to South Africa for SAAF and SRAF'
Checking the Harvard File we have 20SFTS crashed Hatfield, Salisbury, SR 23.1.1942 Looking at Google where this non-British Hatfield might have been, there is a Hatfield basically within Harare, Salisbury, Zimbabwe (then South Rhodesia) and a Hatfield within the Pretoria border in South Africa. 20TFTS was based at Cranborne which is listed in South Rhodesia (todays Zimbabwe) and I feel it is a lot more chance the aircraft actually crashed at Hatfield, SR than Hatfield, South Africa as stated by the National Archives....but the unit is correct!
Beaufort AW375 is listed as: "42/39 Crashed on take-off, Bu Amud, 17.5.42" Surely this was lost with 42 Sqn on that date, on operations against the Prinz Eugen: discovery.nationalarchives.gov.uk/details/r/C17207001 Strangely "The Beaufort File", published 10 years earlier, has the correct details.
If you check AW358 you will no doubt agree that it sounds very similar to what is said about AW375 with regard to 39 Sq. I have no idea how Jim handled the data back in the 1970/80s, but I doubt he was No 1 in UK to get a computer....
As per the AM78, the correct strike date for Tomahawk AK555 is 29.4.42.
According to a post on the RAF Commands forum, this aircraft was shot down on 25.4.42. The pilot, Lt Christian Knut Langaard baled out over the sea and was recovered injured from the water, but died on 10 May 42 when the hospital ship Ramb IV was bombed and sunk whilst evacuating patients from Tobruk to Egypt.