seems saxon also charge a yearly fee for club membership to students. this is £126 per annum.
say 20 lessons a year £126/20 = £6.30 *per lesson*
making £112.30 per lesson, also "possess mandatory 3rd party insurance for solo flight"
some schools charge for this, and from the pricing page it is not clear if insurance is included for solo flight if using the school machine or not.