But there wasnt inaction - the Tories scrapped Labours automatic parole and put the Parole Board back in the decision making process.I believe it was that the Conservative inaction over the last few years means that they are not somehow immune from criticism. And that if Boris is going to blame the previous Labour government, he should also take a look at the subsequent Conservative/Coalition governments too. But that's politically inconvenient. That's my take anyway.
Should they have made that rule retrospective for all cases - by recent events most definitely, but to say they were doing nothing is simply rewriting history.