Driving in Canada from UK.

LMIA for extended employment, or work visa for short term.
In Canada the license you need is called a Class 1, and also requires a medical exam. Once you have your air brake endorsement, you can get a Class 1 if you pass the written, pretrip, and driving examinations.
There are places around my area of Prince George, looking for drivers. Just today was a TV commercial for Excel transportation looking for drivers, they mostly haul wood chips from saw mills, to pulp mills. If you don't mind tire chains, getting muddy, and steep hills, logging is a good gig, and places are looking for logging truck drivers. Money is good, an experienced driver can make $9,000 to $13,000 a month.