Incorrect. You should know full well that you cannot apply the law retrospectively. Khan was sentenced to a DPP (I got it wrong when I said IPP, but they are essentially the same thing) Detention for Public Protection with a minimum tariff of 8 years in 2012 having been arrested and charged in 2010.
That sentence was quashed by the Court of Appeal. That court substituted a determinate sentence of 16 years plus an additional 5 years on licence as part of an extended sentence.
How on earth can his early realise possibly be the responsibility of this government? He was sentenced under law brought in by a Labour government. He had the sentence changed by the Court of Appeal. He was being managed by the Probation Service - it's not the government who do this.
Tell me, how was it possible for the Conservative government (partly in coalition with the Lib Dems for 5 years) to affect Khan's sentence?