They’re making fun of how Brexit was pushed on a platform of getting rid of overstrict EU regulations and bureaucracy (as well as a lot of overt racism) but it turned out a load of it was just homegrown British bureaucracy that had nothing to do with the EU but UKIP voters kept complaining that anything they didn’t like about Britain was the fault of the EU anyway
A good book I liked about it was Trans Liberation: Beyond Pink or Blue by Leslie Feinberg, available here in pdf form: https://transreads.org/wp-content/uploads/2021/12/2021-12-29_61cca107e2f6b_leslie-feinberg-trans-liberation-beyond-pink-or-blue.pdf
It was written in the 90s so some of the terms are sort of dated but it holds true with what a lot of the modern trans experience continues to be