I ran across this site that has lots of useful information on connecting the Cotswolds villages by bus and train. www.explorethecotswolds.com. Hope this helps some of you without a car.
Posted by
Niagara, Ontario
1817 posts
It can be done, though not quickly and not all of it without changing locations. We spent two weeks in Moreton in June of last year without a car. Slow paced, saw plenty of what we wanted to see. A few of the major villages on the eastern side, a few gardens, a few trips to Oxford and Blenheim. A great ale is my favourite alcoholic drink, so no driving.
These will help:
https://www.nationalrail.co.uk/
https://www.pulhams.co.uk/busservices/timetables/
https://www.stagecoachbus.com/
https://www.gloucestershire.gov.uk/transport/the-robin/
I hope the Robin is still working. We used it twice, the only people on the bus.