Parliament is completely sovereign. It can overturn laws, never mind decisions based on interpreting laws. UK parliament has even made lots of ex post facto law

Parliament is completely sovereign. It can overturn laws, never mind decisions based on interpreting laws. UK parliament has even made lots of ex post facto laws over the centuries. It's one of the fundamental disagreements, along with taxes, that led to the foundation of the United States. Here's one example: Alan Turing was convicted of "gross indecency" (having gay sex) and ultimately took his life rather than live with the chemical castration ordered by the courts. It took a lot of convincing, but in 2017 Parliament ultimately passed a law pardoning all men convicted of that former crime. It doesn't matter how correctly the court interpreted the law in 1952, it was fundamentally a miscarriage of justice that we recognise in the present day. It has already been determined by other court cases that many of the court cases that convicted SPMs were unsound, particularly because the court took the Post Office's word for it that their software worked correctly, and we know it did not. Rather than wait years to thoroughly re-examine every case on its merits, which would in itself deny justice to anyone who dies of old age in the process, we should move forward by annulling all of the Post Office's cases.