Citizen - adjective for Nationality?

[Chris McGinlay]

Hi

In discussion on #libervis on freenode with davi tonight, wondering about some 
of the nationalities in the list when registering.

For example, my nationality is British in the sense that I am a British 
person. I think that the use of 'Briton' in this context may be erroneous 
although I stress I am not a grammar expert - just a hunch that the list 
should use the adjectives:

http://publications.europa.eu/code/en/en-5000500.htm

Cheers

Chris