One bit of advice: don't pay any attention to anything said about diversity by Chris Ashford, who teaches at your university. He recently made a fool of himself by co-editing an absolutely rubbish book about gender, sexuality, and the law, which omits all mention of the leading cases, fails to offer any meaningful analysis of the relevant statute law, and presents ideological argument as legal analysis. The book is embarrassingly terrible, and has rightly been lambasted by reviewers. It reflects poorly on Northumbria and on City, where the co-editor Alexander Maine teachers.
Otherwise, just read the questions carefully and make sure that you answer each question clearly. Support each proposition of law by at least one binding authority or unequivocal legislative provision. Draw attention to any case or provision which is not consistent with the view that you put forward, explaining how, if at all, that case or provision could be distinguished, or disapplied.
I am not a law student, but I practise law at the London Bar, and occasionally teach law at UCL.