Hi! If you could put the whole essay question that would be much appreciated.
Since I don't know what you learned in class I can't 100% tell you what they would want but in my mind there are three different ways you can attack this question. First, you could speak about ultra vires/modified ultra vires, this is good for any public law/ judicial review discussion. Say a court's ability to establish in parliament acted illegal. Secondly, in speaking about its powers to create precedent you can mention lack of duty of care in Tort Law with notable cases such as Hill, McFarlane and Rees. Finally, since you mentioned statutory interpretation, you can mention the 4 rules of interpretation and specific case examples of judges using the different types and the effects it can have.
Let me know what way you go and all the best! Feel free to ask me to expand on any of the three points.