Duncan,
Just to add a bit more, 17434 is in the batch allotted to civilians, as opposed to transfers from other branches of the army (as the RFC came under).
Do you have the National Probate Calendar entry?
ARDLEY, Harold John, of Field House, Kynsal, near Audlem, Cheshire, died 20 December 1940 at Tern Hill, Market Drayton, Shropshire.
Administration Chester, 7 March 1941, to Isabel Henderson Ardley, widow.
A Google on RAF Ternhill will bring up loads of hits, a good few relating to WW2.
Phil