This law was introduced in - if I remember correctly - 1956, to conform with something in the Geneva Conventions. The purpose was to enable countries to detain, charge and either try or extradite Nazi war criminals, who at that time had legal immunity all over the place. The country that pushed for it was... Israel! It is a good law. War criminals should obviously not be allowed to wonder the globe with impunity. Baroness Scotland can say what she likes, neither Westminster nor the EU define international criminal law. And the decision to grant an arrest warrant is made by a court on thecase put to it, not by politicians. If Israel, the Sudan, Serbia and Rwanda doesn't like it, tough. Simon Wiesenthal was all in favour of it, for good reason, can't see that the reason has changed one iota If Israel objects, it needs to go to the Hague and try to get the laws changed, don't blame the UK.
Gunmen in Egypt kill guard outside Niger embassy (Reuters)
from the article: Deputy FM: Arrest warrants harming Britain-Israel ties