Brexiteers just respond to stuff like this with "well we should be training our own people to do those jobs" and something about wanting to keep the "right" people from the EU but when everything inevitably goes tits up they won't engage in any self-reflection they will blame the government for not training up British nationals and for not doing Brexit right.
Unskilled, poor paying work for the Brits, skilled, high paying work for the best and brightest in the world.