As a Canadian who moved to the UK I can sympathise with you. Its a big unknown moving across the world!
The comments made about Brits flying in Canada getting given a hard time is BS. Those who do are just people with no social skills or an appreciation of what the word globalisation means. If you are legally entitled to work in Canada and have the licence converted, game on. Tell them to get on their bike as they would say over here.
There is no pilot shortage in Canada, nor will there ever be one. Licences are handed out to anyone and the simple affordability of the training means the flying schools churn out many more pilots than the industry needs. The closest thing to a pilot shortage in the Western world is in the UK. Dash 8 operator hanging around flight schools talking to students. Need I say more?
My advice is get a job in the UK. Build up some hours and get a job at BA/VS. Then commute from Canada. You will be paid better and have much better job security.
I am miles ahead of my old mates back home and get back to Canada 3-5 times a year. May even move back one day and commute.
My two cents.