The practice statement allows the House of Lords to depart from its previous decisions when it excepted right to do so
It had introduced flexibility into the doctrine of judicial president, allowing the highest court to adapt the law to changing social conditions and rectify past errors
The practice statement helps to ensure that the law can evolve and be corrected to prevent injustice for instance in R v Shivpuri The House of Lords used to practice statement to overall its previous decision in Aderton v Ryan concerning the impossibility in attempts to commit crimes.
