If you are not interested in either lawyer route, and you just want to study it for interest, you might want to consider the LLM (https://www.law.ac.uk/study/postgraduate/law/llm-master-of-laws-general/). There are also many LLM's that have specialist areas such as Arbitration, company law, Finance law and each have different requirements which are listed in the 'Key Facts' areas on their listings but the few I looked at didn't specify law was required (International Arbitration and Finance Law for example).
Hope that helps! Nic Student Ambassador at The University of Law (who completed a MA Law before going onto the Bar Practice Course and gaining pupillage to, hopefully, become a barrister)
The masters on offer at ulaw are barely real masters degrees and are only considered such for post grad loan reasons. Don't consider one seriously if you're thinking of doing an llm for the sake of going into academia OP