Why British?

Every form I fill in of late gives me one of two options for nationality U.K. or G.B.

I am neither I was born in Birmingham which is as near damn it the middle of England why is there no English on the forms? It is the language I speak, the country I was born in, the nation I live in and the country I support.

Scots are aloud to proclaim their love of Scotland, the Welsh are the same so why is it so bad to be English?

Rant over.