I’m Canadian but have been living in the UK for 11 years and prior to that I lived in New Zealand for a couple of years and dated an Irish guy. Over time my accent appears to have morphed. When I’m in England, I don’t go a day without someone asking me where I’m from and when I go home to Canada I get the same question and when I reply ‘from here’ I always get very odd looks.
I can assure you that this happened naturally and wasn’t a conscious effort as I don’t have time and energy for such things and if you’ve ever heard me try to copy an accent I inevitably sound like a British Taxi Driver (can I say that???) no matter what dialect I’m having a go at.
To be honest I don’t like that it has changed. It’s not because I was particularly fond of my Canadian accent, eh, but I hate when people accuse me of putting on a phony British accent.