Regardless
of whether the U.K. is a sweat-of-the-brow country or not, there
are certainly countries that are. In Taiwan, Spain, Sweden,
Norway, Denmark, Iceland, Finland, etc., Adam probably has a
copyright on his restorations whether he wants them or not. In
these cases, is it better for him to retain full copyright or
apply a CC-BY-SA license? This is the exact same situation I was
in with the 2D Walters Museum uploads. Even though I explicitly
declared that the images were CC-BY-SA _only_ in
sweat-of-the-brow countries, the Commons community went ape-shit
over the Walters Museum committing "copyfraud" by not simply
applying PD-Art. So basically, the choice for an uploader is
either be accused of copyfraud or retain your full copyrights in
sweat-of-the-brow countries (which may include the U.K.).
No, there is an alternative : one could use a CC-Zero to
waive any rights he might have in some countries, and
effectively releasing into the public domain. Thus no copyfraud.