Legally, the gallery might be right, at least in the U.K. (though not in the U.S., where the servers and apparently the individual Wikipedian are). Morally, however, I have to side with the "free culture" crowd and oppose efforts by institutions to gain proprietary rights over things whose copyrights are nonexistent or long expired, simply based on their possession of the physical objects and their limiting the ability of outsiders to make photographs or copies of them.
----------------
Now playing:
Nikka Costa - Push And Pullvia
FoxyTunes