Having gone through more of the collection now than when I posted here last night, there are a number of photos in it from the UK, as well as various points in the Med, Egypt, the Trans-Jordan, Palestine and of course Iraq. The photographer seems to have been posted all over the area at various times.
Glad people are enjoying it. The Flickr Commons (the scheme under which archival photos like this get from various museums up onto Flickr) is an awesome setup, lots of great stuff, and institutions all the way from the Smithsonian and Library of Congress down are involved. The San Diego Air & Space Museum Archive just joined Flickr Commons not too long ago, but they've already got a spectacular set of images up.