ACRE - Action with Communities in Rural England. From thir website "Action with Communities in Rural England is the national voice for our 38 member organisations who make up the country’s largest rural network. Together, we reach 52,000 grassroots organisations in 11,000 rural communities."
Rural Services Network - is a network of rural organisations and local authorities in both private and public sectors. It's website provides an invaluable resource, full of news on all aspects of rural life and campaigning for both a Rural Strategy and fair funding for services. You can also sign up for their weekly newsletter via this link - if you haven't already I would highly recommend it.
Countryside is a membership category of the National Farmers' Union (NFU). Its website has a section on coronavirus, and also information on farming, food, caring for the countryside.
Countryside Alliance
https://www.countryside-alliance.org/covid-19-hub/guidance-for-countryside-activities