The rules for works of art are straightforward it is photographs that’s muddles the issues.

...the European Visual Archive report on copyright issues [EVA] lists no less than five differing expert opinions on when photographs are covered by United Kingdom copyright and by whom.

:)

http://www.chin.gc.ca/English/Intellectual_Property/Virtual_Display_Case/obligations.html

Eventually the judicial system will lift common photographs from the burden of copyright (Remember that you read it here first) but it will take looong time.