According to today's 'Sunday Times,' top tutors can charge between £150 - £1000 an hour for their services. I was much amused by this (especially the notion that 10 years' experience enables you to teach just about any subject - I must alert my dear friend in Cheam, who has 26 years' experience) & looked at the website which purports to recruit these geniuses (or is that genii?) and read no further than the second paragraph, which begins 'The same principal applies to...'
Also according to Sunday Times, these super tutors are for the offsprings of Rockstars or Royalty (or maybe the top bankers - the one who put us all in the great mess).
Secondly, the tutees supposedly learn to get into Oxbridge by few hours or at best few weeks of lessons from these super tutors. If more lessons are needed then most likely the rates for these tutors would go down to £20-30 per hour.