Didnt we all rip the proverbial out of someone with an almost new veh, not long ago, for not understanding the 'whichever comes first' bit? I seem to recall he was trying to argue about a fault which had happened , outwith the time period , but within the mileage. His argument was also the ' I haven't done X miles'. Despite the wording being 'time OR mileage, whichever comes first.'
@Sutto , as you have the service book, you will be able to see which service is due. If it is a major service, the amount of mpy you do is irrelevant. You have done the required mileage where the service is needed. Just do it and revel in the knowledge it will take a while before you have to do it again.