Car is going in tomorrow and I just looked back at the paperwork for the first 5 services done under the service plan.
Can't recall noticing this before but the service checklist used seems almost random. It should have been the SVRS one, although the car has faithfully requested annual servicing. Some years this is correct but others used the fixed 12,500 schedule.
Last year the dealer used the "Honda 12" schedule. Pity I didn't think to look at the service code the car was asking for - it doesn't appear to have ever had its air filter changed.