Prices generally have been kept at 30 pounds. This covers a class of nearly 2 hours of group tuition. For 1-to-1 tuition, the £30 will be for tuition for an hour.
For 2017-2018, this can be on a pay as you go basis.
I tend to find an hour's tuition not long enough in general for students sitting higher maths, but every student is different.
Often times for tuition become semi permanent after October, so it is advisable to highlight suitable times prior to then, so that the times for the class can reflect the most flexible time for the majority of the students.
The tuition occurs either just after school, the evening or at the weekend.