Some Universities are very oversubscribed - Law at Manchester is 21:1. To maximise your chances on these courses you need to maximise your grades and be able to show practical examples of your enthusiasm in your personal statement. You could also consider other strategies. Perhaps for law do a generic degree for example History, followed by a law conversion course - but this comes with a health warning - this is a much more expensive option. You could opt for a joint honours course - these often have a lower entry threshold. You could apply for some similar courses at a ‘recruiter’ university.