My one bit of advice for a new escort would be: don't be greedy!
You can make £400-500 a day without cramming everyone into a short space of time. Allow two hours for an a one hour booking and you can relax and treat the punter well without stressing over the conveyor belt.
The time you have spare for waiting around you can relax, freshen up, deal with communications. Eat, drink and be happy...