Just that really - I think it is but I could be wrong and there may be many other examples of where this works well. Other info (if needed):
Indie SS for EBSD/ADHD boys aged 8-19 with a dedicated unit for ASD.
The 5 minute rule applies to Day Boys only.
Many Day Boys travel up to 30 miles each way, rush hour with the last 3 on windy,country lanes (not my ds).
If the boys arrive before 0855 they must wait in their taxis/cars if they arrive after 0900 they are late.
Is this OK even if it was a different circumstance?