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.
--
Jean-Frédéric