I have assumed the warranty will be honoured by any Honda dealership in Europe, as long as the work required qualifies , and that I have complied with the normal condition that the car has been serviced in accordance with Hondas schedule.
I have interpreted the recommendation for having the car 'checked' prior to the trip as a subtle reminder to ensure the trip away wont result in you invalidating the warranty by exceeding the service mileage or period. And checking the vehicle over before a long trip is sensible anyway.
A recommendation/suggestion rather than a requirement. But i could be wrong of course. They do have other get out clauses such as if they consider the fault was caused or made worse due to driver neglect, such as not checking the oil dip stick or ignoring a warning light.
Here is what i do.
If there is enough time and mileage left to complete my trip before the next service is due I just do owner checks myself of fluid levels, tyre condition and pressure etc, .I do them a few days before the trip in case I find any snags needing attention. But this year I will be getting its annual service a month early ,due to a planned continental trip.
Thinking outside the box .For those on a long trip who may have a bit of local knowledge or contacts could consider getting the car serviced by a local Honda dealership when it becomes due. Probably cheaper than the UK dealer prices. I have done it in the past on my old Yaris, but I have a 5 year free service plan for the Jazz, who will only pay for servicing in the |UK.