I'll preface this by saying I'm broadly in favour of decriminalising prostitution, it's interesting to note that in the UK, prostitution itself is not illegal but operating or working out of a brothel (anywhere 2 or more prostitutes work) is illegal. So one of the main ways prostitutes in the UK are made less safe is by preventing them from legally grouping together into a property forcing them onto the street or into the seedier parts of the Internet.

One of the major problems with legalising prostitution in areas where it's been done (such as Amsterdam, Germany and Australia), is there seems to still be issues around trafficking women and using them as effective slaves to their pimps/handlers and there doesn't seem to be enough to tackle that issue and the normalisation of sex work does forster an environment where the victim isn't able to reach out to people like the police as well.