Lemon Torte me old fruit!
If it's any help, our UK guys going over to operate Skyservice aircraft for the winter all have to complete the Canadian ATPL written exams plus an LPC/OPC on type for issue of the Canadian ATPL. Regardless of experience...
We have an instructor who comes over for 3 weeks, not sure how you would do it privately...
There are email addresses on Transport Canada's website - ask the question!
But you will require a Canadian licence to operate a 'C' registered aircraft...
Good luck!
