Just a small point, if I may; references to ‘UK’ law are misleading in that Scotland, England and Northern Ireland have separate legal jurisdictions. Wales too, probably, though I am not sure.
Northern Ireland has adopted the, so called, ‘Nordic Model’ and punters can be prosecuted although, in practise, they are mostly not.
In Scotland prostitution is not currently illegal. However, a committee of the Scottish Parliament is currently examining the law. Worryingly, the chairperson of the committee is Rhoda Grant, a well known feminist, punter hating bigot who has been to the forefront of efforts to have our hobby outlawed. No chance of objectivity or impartiality from her, then.