You can also land in Canada within the time frame described and then return to where you are living now (somewhere in the UK, I assume) to pack, move, and/or conclude any business there before returning to Canada. Your PR card must be mailed to an address in Canada though and you will need it upon return. Also, there is a requirement for number of days spent living in Canada as a PR. Is it 720 days for every 5 years, or something like that?