Ooh no, no no no, considering the Scots, Irish and Welsh like to round on the English as the only country that isn’t part of the Celtic Brotherhood, this would be a really bad idea (and let’s not forget, there’s more of us )
Reading this thread, seems amzing we’re not all constantly at war with each other. We actually get on pretty well most of the time.
As to ‘British’, vs ‘other’, as my welsh girlfriend says… "Proud to be British – privileged to be Welsh’ which I think is the healthiest attitude.
The English and Scots have only been British since the 1700s. Before that, the term was only used for the Cornish and Welsh. (Which makes Irish objections to “British Isles” sort of amusing: 400 years ago, “British” was quite explicitly “not English.”)
All of England was Celtic before the Roman invasion, and parts (Cornwall) still are; some of Scotland hasn’t been Celtic for 1200+ years. “Celtic” is another victim of politics: it gets used for “everyone gets to be Celtic expect for the biggest nation on the islands, which is Not Celtic.”
(And this is completely ignoring the question of why English-speaking Irish people get to be Celtic but English-speaking English people don’t.)