<i>An upcoming new law will make it illegal for men to pay for sex with a trafficked or pimped woman – and a punter's ignorance of a woman's ­circumstances will be no defence.</i><p>This sort of law, what I believe is called "strict liability" in England is horribly unfair. I understand why ignorance of the law cannot be a defense to a crime, but ignorance of <i>fact</i> should always be. In certain situations, it may be reasonable to require that the person make a reasonable attempt to check the facts, but there's only so much a person can do.