It transpires that the prostitutes were payed £ 2500 between the five of them for the entire session, which boils down to £ 100 an hour. NO hooker EVER accepts a special assignment of this kind with a man of Mosley's position and income for that sort of money
You are forgetting these were super efficient German prostitutes. £500 for a session is surely possible.

If they had been French they would have ed off to lunch after the first couple of hours, and then gone on strike in protest at being undercut by cheaper eastern European prostitutes.