Let's take Nova Scotia as an example. I would think that it would form one region, so we would have a reduced number of single member seats. Instead of two seats for Cape Breton, perhaps there would be one MP representing Cape Breton in a single member constituency. As for seats, you would use the remainder of the seats for Nova Scotia as top-up seats, and the MPs would be Nova Scotia MPs representing the region of Nova Scotia. That would allow for proportionality in the end.
On October 4th, 2016. See this statement in context.