Oh Sallington !!
How very annoying for you
I would definitely tell him to kick up a fuss about this and stand his ground - he should tell them he can't be moved as you are celebrating something together (anniversary or some other family occasion - the whole purpose of the trip I would say) so you HAVE to eat together ...tell them anything !!
- for all purposes your bookings are linked as you are relatives - he should insist he stays with you...perhaps if he kicks up enough fuss with the T/A and/or directly with the hotel, they might relent - worth a try.
I'd be so annoyed if this happens to us, and its annoying that it is allowed to go on - like going into a garage to buy a Ford and being told you must have a Nissan, because its still the same standard of car
We have booked independently with an accommodation only provider - so I'm hoping that we wouldn't be quite so vunerable...
But, there again its difficult to know if the fault lies with the hotel or the tour operator - its difficult to concieve how this happens. Perhaps someone in the industry can enlighten us ????.....however, these big tour operators seem to be a law unto themselves, once they have your money !