Seems like the post-COVID recovery, crappy weather, COL and other factors have dampened the situation for people owning holiday lets in places like Cornwall. On the other hand, perhaps (as the article hints towards the end) there will be an increase in long term rental properties coming on to the market.
https://www.theguardian.com/money/2024/apr/07/britains-staycation-boom-may-be-over-as-bookings-dry-up?utm_term=Autofeed&CMP=twt_gu&utm_medium&utm_source=Twitter#Echobox=1712464698
Anecdata from talking to friends tells me that many people are fed up with the rising cost of holiday lets in these places, more and more demands being placed on guest re cleaning etc., and the fact that so many local places like restaurants are understaffed; of course, part of the issue may be that locals have to an extent been priced out of the local housing market, meaning there are fewer people available to clean, mow lawns or wait on tables. It may be a good thing if the local housing market self-corrects in this manner.