I just wanted to let you know - I parts of the British military *do* have dog tags, it just depends on which part you're in. As far as I'm aware the RAF and the SAS both have dog tags with the information that's listed on Wikipedia.

I'm having trouble finding a good picture but replicas are also sold on Ebay: http://cgi.ebay.co.uk/CURRENT-ISSUE-BRITISH-MILITARY-DOG-TAGS-ARMY-RAF-SAS-RM-/380070665697?pt=UK_Collectables_Militaria_LE&hash=item587dfa1de1