Franglais:
From the experiences of my colleagues the French authorities are looking harder now at wages, contracts of employment, 45 breaks etc. Good thing too I say. Try to even up the playing field a little so legit companies trying to do the job right arent undercut by those not even trying to follow the rules. And I think youre right that Brexit will do no favours to anyone in the UK haulage game.
It may have an indirect advantage to us over the hordes of 3rd-word invaders in and around Calais heading for Britain in that we would be able to deport them straight away without appeals ect , and be able to control who is entitled to benefits and housing ect unlike the free for all now ,with the open border approach