Yes, but the uk doesn’t have the spare non urban centres
There is plenty of space in the north of the UK, where the climate is far milder than in the immense majority of the territory in Canada.
Windsor to Montreal is also really one big city. Unsurprisingly since it’s one of the areas with relatively mild climate, compared to places like Nunavut.
Space is not the problem. The problem is that we welcome over a million people coming to the country per year and we are not building nearly enough housing for them.