I am not a lawyer either, but they will certainly get away with it. Some years ago, a junior defence minster was caught red handed peddling guns to unsavoury Arab dictators. He denied everything, including the fact that he was supplying call girls to his clients. There were mobile telephone protocols to prove it. Although this was disclosed on national television, he remained safe. Ironically, one of his titles was "Minister for Defence Procurement". He obviously took his "procurement" responsibilities very seriously. He denied everything, of course and got away with it. Government ministers are "international defence advisors", not gun runners like the rest of us, if we get caught dealing in weapons.
That particular minister got off with everything scot free, until he fell on a very small detail. He sued a newspaper for claiming that his hotel bill in Paris had been paid by his Arab friends. He claimed that his wife had paid it. When the newspaper was able to prove that his wife had been in Switzerland at the time, his case collapsed and the judiciary was forced to prosecute for perjury. I stress the word "forced". He was sent to prison. No charges we ever made for the arms dealing or pimping. You get punished for bringing the system into disrepute in Britain. If you are rich and powerful, minor discretions like illegal weapons dealing do not attract severe penalties.