I must admit that when I saw the described routing of the accident aircraft (Lincolnshire to Bobbington) I did start to wonder if it was Canadian or Australian crewed. (Lincolnshire was "Bomber Country" for the RAF, while the USAAF operated from (generally) East Anglia. Bobbington was, of course, an RAF training base).
I haven't got a site for RAF crashes (but will look). What I can suggest is that Air Britain Publications publish a series of registers which "... list aircraft of the Royal Air Force in serial order and provide details of each aircraft, the units which flew it and its
final fate..." (my emphasis).
You could try and see if any aircraft loss fits the bill for your one. I appreciate that that may be a big job - there are 18 volumes.
East Anglia Books have some for sale (
http://www.eastangliabooks.com/great.britain.htm ) (and they list the volumes by coverage) and if you look at this website on the make up of UK military aircraft serial numbers (
http://www.clubhyper.com/reference/b...erialssm_1.htm ) it may help narrow down the search by excluding some of the volumes.
P