In the UK you are going have to be careful:
"....new laws are introduced that allow for the arrest - and imprisonment - of anyone who takes pictures of officers...."

http://www.bjp-online.com/public/sho...ml?page=836675

http://www.amateurphotographer.co.uk...ws_175462.html

http://www.metro.co.uk/news/article....4&in_a_source=