It looks like SecretLondon is the one who put most of these up.
http://en.wikipedia.org/wiki/MediaWiki:PAphoto
"This image is courtesy of PA Photos Ltd ( http://www.papicselect.com/ ). It is copyrighted, and not to be supplied to third parties. See Wikipedia:Pictures from PA Photos Ltd for details."
http://en.wikipedia.org/w/wiki.phtml?title=Special:Whatlinkshere&target=...
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These are from a vareity of contributors...
http://en.wikipedia.org/wiki/MediaWiki:Noncommercial
"This image is not licenced under the GFDL. It is under a non-commercial-use only licence."
http://en.wikipedia.org/w/wiki.phtml?title=Special:Whatlinkshere&target=...
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Some of the above might be usable under "fair use", but I think we should be very cautious about fair use.
--Jimbo