My hon. and learned Friend raised the question of scope and when they would apply, but it seems to me that he was answering his own question, because it comes when there is a clash between the law that has been retained and has supremacy and any domestic legislation. It is precisely because the supremacy of the retained EU law is kept that it is necessary also to
have the potential for the general principles to have that supremacy as well, because they are essential to the purpose of interpretation of that law.