On the basis that I nearly missed my flight because of the Special Assistance team being sloppy about insert the NMOK for both bookings, seemingly going back and forth between one and the other. On the basis that I WOULD have missed it if I hadn't had the pure luck of spotting the Swissport dispatcher and him being helpful. Entirely easyJet's fault that I was put in that position, as I followed the correct procedure by submitting the self-declaration via the contact form once for each booking.
As I said, I have no idea what's reasonable when the Special Assistance Team's incompetence caused me to feel extremely unwell until it turned out (upon boarding) that the Swissport dispatcher had sucessully coordinated things with the easyJet crew.