narrow definition

It's not the definition I proposed that's narrow.
The provenance of music played by English musicians could be just about anywhere.
As a maritime nation, it always has been.
It depends on how that music is played and what it is played on and incorporated into the indigenous tradition that matters.
Local music with a sense of place as I said.
Anything 'celtic' usually is evil, unless it's from musicians steeped in their own tradition and have taken the trouble to re-create ancient instruments and authentic texts.
As opposed to commercialised, wifty-wafty, new-age shit.