Originally Posted by
tomvancouver
Hopefully the passport is less than 10 years old, and is still valid! If you are even eligible for a British passport you can't get an ETA.
I flew to the UK 3 weeks ago and had zero issues checking in-online using a British passport. And no problems on the way back using my Canadian one. I didn't fuss about any existing profile.
You can renew British passport up to 6 months before it expires, the "balance" gets added to the expiry date on your new passport (wish Canada can do the same). My passport is indeed over 10 years old and it doesn't expire until April 2026.
I don't look anything like the picture though, I was at least 20kg lighter back then but I digress. I'm more concerned about AC's GA than the border force to be honest, they can get pretty creative when pulling new rules out of their bottom.
Thanks for the information, I will try checking in with my British Passport.