Practice your British accent - Canadian pilots not exactly flavour of the month at the moment - nothing personal, just the usual -'come over here, taking our jobs' etc which of course is and always has been a two-way issue.
British pilots seconded to Canada last winter to fly Canadian registered aircraft had to sit Cannuck ATPL exams regardless of how long they had held a UK ATPL and their levels of experience which were VERY high in some cases. As a result do not expect any favours from the UK CAA in respect of foreign licences.