Obviously we’re looking at this from the point of view of U.K. pilots, but U.K. operators probably didn’t want Brexit either. If the supply of ACMI from the EU was stopped then the companies using them would have to either reduce capacity, or alternatively somehow find additional aircraft and go through the process of placing them on the U.K. register, and recruiting flight crew, cabin crew and engineers. Those aircraft would then sit around in the winter losing money, and that would certainly reflect upon the bottom line and on the Ts and Cs.
As someone mentioned it has always been thus. I got my U.K. (non EASA) CPL in 1986 and it was ten years before I had a job that paid more than a truck driver, and I was flying for the whole ten years in non airline jobs.
I admit that I didn’t vote to leave, but it is what it is, we’re stuck with it and sadly spending time discussing it on pprune won’t change things.