North of £800 a shift not including tips? That'll be because brothels are cheaper and the punters swarm in. If HoD were £100 an hour I'd go there myself, it's £150 though External Link/Members Only
As Laura has pointed out, the girls earn £100 per hour after the house takes its cut. For a 1 hour booking they take £100, HOD takes £50, 45mins They take £80, HOD takes £40, 30mins they take £50, HOD takes £30.
I know this because I've been told so by multiple girls and it's not everyday they're making circa £800, lots of factors can affect this. Train strikes badly affect their earnings as does half term/summer holidays for some reason.