The first appointment is 50 minutes long. This is when you and your therapist will agree on what issues you will be working with. This session is charged at £50 and subsequent sessions are charged at £50 per hour.
When a session duration includes a fraction of an hour, this will be charged in 15 minute intervals. E.g. A session of 1h 15m will be charged at £50 + £12.50 = £62.50, a session of 1h 40m will be charged at £50 + £37.50 = £87.50, etc.