I don't believe that UK's Supreme Court can override direct actions by Parliament[1]. They can override "secondary legislation", regulations created by ministers using authority that Parliament gave them, but in that capacity they are ensuring that ministers follow the laws that Parliament created, not acting to reign in Parliament.

They can also declare that legislation violates human rights, but that declaration is non-binding. They are effectively just asking Parliament to go back and fix the law.

[1] https://en.wikipedia.org/wiki/Supreme_Court_of_the_United_Ki...