Sarah,
Any joy on your serarces on other sites?
I do not know whereabouts you are in England, but it might be worthwhile (if not done already) checking out the National Archives at Kew.
Nominal listings of POW's in Germany, German-held territory, and Italy, are contained in WO392 Sections 1 to 26 and Canadian names are apparently included in their own section. WO208 contains all sorts of other information such as liberated POW questionnaires and Escape and Evasion reports.
This page gives an explanation of what is held in the 26 volumes:-
http://www.nationalarchives.gov.uk/c...llDetails=True
This page shows details of WO208, but there are over 5,300 files in it:-
http://www.nationalarchives.gov.uk/c...llDetails=True
Might be worth a try!!
Paul.
(edit 15 Oct - What was that word supposed to be? search; must have had too much falling down water)