First they abolish double criminality: so that you can only be extradited is what is a crime you are being charged with is also a crime in Britain. Then:
As the European scrutiny committee of the House of Commons noted in its report on the proposed reform: \”[This] is both novel and far-reaching: it gives national courts competence to try a criminal offence that is not prescribed by UK law or, put another way, that the Government has not proposed nor Parliament agreed should be a crime. Instead, jurisdiction comes from the EU Member State that is transferring the proceedings.\” For instance, someone accused of holocaust denial, a crime in Germany and Austria, could be tried for it in an English court even though it is not an offence here.
They\’ll try you in an English court for something which is not a crime in England.
Regular readers might note that I\’ve been saying for some time that we should leave this monstrosity. Can\’t say that this makes me change that opinion.