While I don't really see the need to break-up Peel at least until we figure out GTHA governance a little better, I suppose an argument could be made that once a GHTA city hits 400,000+ they could ask to be single-tier. Thereby Toronto and Hamilton (both already single-tier), could now be followed by Mississauga and Brampton.If Mississauga separates, I have no doubt Peel would cease to exist. Brampton would be newly independent, and Caledon would probably join either Dufferin or Simcoe County. That said, I'm not sure if Mississauga will be allowed to separate. If it did, would Peel Police be split up too? Into a Mississsauga and Brampton police force? How would Peel Police assets be divided up?