Hours

30 plus 12 weekly over 26 weeks (2 terms...probably more) is 312 'banked hours')

30 x 6 week summer break is only 180...those weeks wont be no work, but the hours are already completed ...equivalent of 10 weeks in hand

OK the payment isnt at £25 hourly becuse of covid and not all are direct hours and exams were cancelled...so there are extra special considerations. It's approx 9 x £20. There are discounts multi lessons. Out of that are expenses. Its not profit.