He didn't ask for recommendations
You're arguing semantics. He asked for any SPs that "offer a full on, full-blown lesbian show in the west midlands", possibly realising that a lot of escorts claim on their profile to offer a lesbian experience but very few escorts actually do.
I've yet to try a threesome but before I do and shell out £250-£300, I too would want some confirmation from personal experience of other punters that the escorts actually offer that - in effect, a recommendation.
As I said, of the two SPs, one has two reviews - both of which are negative - and the other is not reviewed at all. That doesn't inspire confidence.