A kind offer neddy man, but if advertised on Rightmove ( keywords 'equestrian, acres, smallholding'), ZooPla, OnTheMarket, Prime Location, News Now Classified and Facebook Equestrian Property sites and any equestrian/country living/leisure sites specific to our areas of interest ie. East Anglia (not fenland), Somerset and Devon, then we're already aware of them. These days properties all make their way to at least one of these sites and more often are advertised on a couple in addition to their local estate agent's sites.
The estate agent who dealt with our house sale here told us that the market is pitiful atm. due to uncertainty over Brexit and repercussions of Covid. The market for properties with our criteria (excellent, plentiful safe hacking with great choice of lanes, some off-road routes, 4 acres+ grazing, 3 bed house (not a total doer-upper), not on top of other houses, ideally with stables, tack room, feed/hay store are not coming on the market in the current climate, whereas new builds without land are there in abundance.
Realistically I don't think the situation will change massively until the country's safer and vaccinated and the weather is better, and until viewings of occupied houses can restart. That aside, it won't prevent me searching though.