If you don’t get the car serviced motability will send you a reminder to get it done and say if you don’t you are in breach of contract.
Indeed, I just found out my neighbour missed their 1st service and then ignored further reminders due to disability and life issues getting in the way. Motability took the car back for breach of contract.
The warranty also forms part of the resale value after the lease expires. Motability may have clout, but Hyundai are not going to replace a failed engine for free on a 2 year old car with a missed service schedule.
I have now spoken with them and have a service date arranged.