I understood that this 'SPIC' thing came as a result of pressure from a certain school not far from Blenheim Palace, who couldn't compete commercially due to the number of days when their non-IR holding students woudn't be able to fly due to weather?
So, weather a bit marginal? Put a FI in the other seat who isn't supposed to do anything unless the weather goes outside the student's limits, wherupon it becomes Pu/t time. Of course, that happens.....not a lot.