The CPS != "the crown" (at least not today). The CPS is the UK equivalent of the DA's office. It's a political bureaucracy (I could literally complain for days about how much of a bureaucracy it is, but you'd get bored of me :)).
The judge, theoretically, is more of the expert on the law and whether it should be tried - but the CPS have to decide to bring the prosecution to him/her. Which is why you regularly get cases that should be seen in court, but which a suit decides is statistically unlikely to prosecute favourably.
Don't English and Welsh law allow for private prosecution of crimes in cases where the CPS declines to prosecute?
Wouldn't that provide an avenue of relief to the copy right holders without removing a UK citizen from the jurisdiction of UK laws?
This whole thing seems troubling to me.
How many US Internet companies collect VAT from sales to folks in the UK? Would that make founders of a US startup subject to extradition to the UK for tax avoidance? What if it's just a tiny DBA "company" with no liability shield?
The judge, theoretically, is more of the expert on the law and whether it should be tried - but the CPS have to decide to bring the prosecution to him/her. Which is why you regularly get cases that should be seen in court, but which a suit decides is statistically unlikely to prosecute favourably.