Sexual Offences Act 2003
(1)A person (A) commits an offence if—
(a)A makes or promises payment for the sexual services of a prostitute (B),
(b)a third person (C) has engaged in exploitative conduct of a kind likely to induce or encourage B to provide the sexual services for which A has made or promised payment, and
(c)C engaged in that conduct for or in the expectation of gain for C or another person (apart from A or B).
(2)The following are irrelevant—
(a)where in the world the sexual services are to be provided and whether those services are provided,
(b)whether A is, or ought to be, aware that C has engaged in exploitative conduct.
(3)C engages in exploitative conduct if—
(a)C uses force, threats (whether or not relating to violence) or any other form of coercion, or
(b)C practises any form of deception.
(4)A person guilty of an offence under this section is liable on summary conviction to a fine not exceeding level 3 on the standard scale.
As you will be aware, prostitution is not illegal in the UK. So, a person could make a booking through an escort agency for a perfectly legal meting with a prostitute. Let's suppose there are two women on the site that attract our would be punter. One is free, willing, and likes the job. The other is indifferent to the job, but does the work to pay for her self medication which she couldn't afford otherwise. Her 'boyfriend' has encouraged her to take up the work saying he will buy her the smack she requires. So, the punter calls girl 1 and he commits no offence. If he calls number 2, then even though the escort agency's website makes it appear that girl 2 is eager and willing, he is up the creek. Even if the booking is made but the girl never gets to hear of the booking. If the police raid the agency and get the punter's details, perhaps because girl 2 has rolled over on her 'boyfriend' and they have a statement from her to the effect that he has encouraged her into prostitution.
At present there are no figures to suggest that such a thing is happening, but it is clear to me that it could. I'm sure that such bookings take place on a daily basis. And, how many cautions have been given out for this? If the punter got busted, I suspect that any lawyer could only recommend a caution be accepted, for there seems to be no room for manoeuvre in this. Even though it is a summary only offence (so no jury could express it's disgust at such a principle) it could be a potentially life ruining event for the punter.
"I do not agree with what you say, but I'll defend to the death my right to be offended by it."