And they're gaining much freer and better access to the markets of... Canada...
Ironically, Canada just concluded CETA a free trade agreement with the EU and so Brexited UK will have no more than normal WTO trade status with Canada (which is what they'll start with after Brexit for all of those other nations you called out until they can negotiate some other agreements).
But had the UK stayed in EU, they would have had a premium trade arrangement with Canada they won't get now.
Even though Canada's head of state resides in UK. How is that for ironic?