Trials in absentia
You missed the other British inspired attack on Europe, the trials in absentia.
The proposal is that someone convicted in absentia *must* be released by the country they are in if the requesting authorities says they have been informed (or indirectly are assumed to be aware) of the case. Unverified, they simply check a box on a form.
So country X will prosecute people in their absence then demand extradition. Apparently they could not extradite them for trial (or simply didn't try, they can post a letter then treat that as having informed them), making it easier to convict anyone in another country simply by not trying too hard to extradite them or inform them, then convicting them by default (because they're not at the trial), then extraditing them.
Having insufficient money to go to the foreign country and defend yourself is not a defence to this. No court in your home country can stop this.
So everyone in Europe will be exposed to the UK's legal system and it's current problems. The UK permits secret witnesses, heresay, preemptive seizure (i.e. punishment without judicial process) and other stuff incompatible with the EU Fundamental rights, so they're exposing the whole of Europe to the legal system of countries who don't abide by and haven't signed up to the EU Fundamental rights legislation.