A long shot indeed. We've had an old spoon knocking around at home for years and it's turned up again. It is a 1931-dated Mappin & Webb with WD mark and is stamped WTS 8042. I'd not really thought about it before but assume that it is a fairly early WTS / FANY number (did they re-issue their numbers when they became 'Women's Transport Service' in 1937 or was the prefix not needed in peacetime and added later ?). A quick search of the London Gazette hasn't shed any light. Are there any other on-line records that might put a name to a service number ?