@Mark116
Nope. I don't think it's different in shared homes. Not in my experience anyway. I have never had a guest ask my vaccination status (let alone that of the other guests they will be sharing the house, kitchen, bathrooms and more with). Maybe they just assume? Maybe they don't care...
From my end, I've had a few surprises during this pandemic, so I'm trying to be more vigilant, e.g. just turned away a guest who wanted her unvaccinated boyfriend to stay over regularly.
I've had the guest early on in the pandemic that told me he had been quarantining for three weeks, but then let slip when he arrived that he had only returned to the country nine days earlier and hadn't quarantined at all.
I've had the NHS frontline worker who casually revealed after arrival that she hadn't had her second jab because she just hadn't gotten round to it. Luckily, I think my astonishment prompted her to get the vaccination asap.
So, now I am asking all guests about it. I had already been quite on it about checking quarantine/testing restrictions for overseas travellers (of which I have had few) but stupidly assumed that most UK guests would be vaccinated. How naive!