Gerrymandering hasn't been a problem in Canada since redistricting is carried out by regional independent commissions operating under the auspices of Elections Canada. The public gets a say in how ridings are drawn. House Of Commons seats are redrawn once decade and the House adds a couple of more seats due to population growth. However, no province can be left with fewer seats than they had under the British North America Act. So that's why no party can have a real lock on permanent power, unlike in the U.S gerrymandered system. It helps to hold Canada's political parties responsive to the voters.
Thanks for the info. I think one of the advantages of Canada's system combined with a relatively small population is the districts contain only a small population so from what I heard candidates can be very effective in door to door campaigning. Congressional districts have gotten too big in the US.
Is the Commission drawing the districts well regarded by all the parties? From what you say its not full of Grits trying to keep the Libs in power.