There are external agents such as humidity, cold that report the state of a colony, that is, in the absence of other indicators in the honeycomb, we must assume that the population with which you entered in autumn was insufficient and while the queen is alive, the bees will not abandon the hive.
The queens may have died in autumn. One of the reasons for a leave-alone strategy is to try to locate strains that are good at superceding. With just a few hives you could monitor and take action of some sort, but with 60 or 70 and a bunch of other stuff to get down, live and let die sees, on average, the best come flying through.
You can't breed without a selection process. My process aims to locate the most self-sufficient.
If you are not breeding then you are a beekeeper in a fairly limited way.
Again, it makes me somewhat perplexed that someone who maintains a "Life or death" procedure and who does not treat varroa is reluctant to accept a death from varroa and attributes it to "dampness", revealing his manifest inability to be a beekeeper ...
You have just QUOTED my admission that they may well have died from varroa. So I don't know what this is about.
(because the following year I would divide the apiary with some criteria of varroa infestation and I would treat the most infested in order to improve their survival criteria).
Eh? I'm not sure if you still haven't got the general idea, or if your English/translator is letting you down here.
You are not a better ecologist for proposing an optimal life for wild colonies while leaving beekeeping and bees as the lesser evil. Begin to understand that your action causes the decrease in the diversity of the bee population, on the way to their extinction and the loss of the work / hobby of others.
That's nonsense. There is zero lack of diversity in the UK - in fact many would say there far too much diversity. Helping local populations to thrve not only massively increases diversity, it restores the right kinds of diversity.
You have 2 options
1. Keep releasing beliefs of a theoretical scientist and a bad beekeeper.
2. Be more empathetic and try to improve as a beekeeper.
I make no claim to being a scientist. I do have a claim to understanding the science of evolution and natural selection, the way it corresponds with selective breeding and organic husbandry. I can recognise full-on agreement with my understanding when I see it in peer-reviewed papers. I have corresponded on a number of occasions on this topic with esteemed bee scientists, and found full and complete agreement.
A bad beekeeper, by your lights.
There are some who make a distinction between beekeepers and bee-users. Those primarily concerned for the health their local free-living population I would say are the only ones who belong in the first category. To husband local genetics in order to keep the local population strong and self-sufficient is the only appropriate form of husbandry for a free-mating animal. The veterinary model of husbandry, combined with a highly lackadaisical approach to reproduction, is an ongoing disaster for wild bees and the ecologies that need them.