SolvedETASSUM31030 | Schedule 3 SAYE Option Scheme: General requirements: Advance payments of exercise price
From HM Revenue & Customs · Employee Tax Advantaged Share Scheme User Manual
An arrangement of this nature would conflict with the principle that the exercise price is met by the savings contract repayment; this would not be appropriate and therefore unlikely to be seen as meeting the requirements of Schedule 3 ITEPA.