JARIC no longer hold the archive - it was mostly shipped out to Keele (sp?) University.
Quite a bit was destroyed instead of shipped to cut costs (including almost all of the pre-invasion images for D-Day - to quote the guilty party "it was just loads of films of nothing but beaches")
Best bet for the UK in wartime was the Luftwaffe stuff - should be available via Keele or the PRO.
RAF imagery of the UK is rare-ish during the war years (oodles of it for Europe) but there was some fantastic stuff from just after VE day. I remember looking at a random tin only to find the most amazing low-level oblique Mosquito imagery of Lincolnshire from about 200ft. Lots of bomber airfields on that roll, but i'm afraid I have moved jobs now and no longer have the sortie details.