i need some examples of cases to illustrate the extent to which judges apply the law in England and wales?

Answer 1

I'm not really sure I understand your question; any English or Welsh case will illustrate that. An example of the English courts putting their own unique spin on European Law (and in turn making it English Law) can be seen in Parks v. Esso [1999]. If you make your question more specific, I am sure I could give you more examples.

Answer 2

A judge's job is to apply the law so they will be doing
it 100% of the time. They have so much leeway, though, that it's possible for them to impose a fine for a crime that somebody else in similar circumstances might get life imprisonment for. eg. motoring 'accidents'.