Plan is start on Saturday in Cirencester
That’s over the border! Hope your jabs are up to date! 🙂
I’d try heading across north of Swindonia, then looping south through the likes of Bishopstone (Try the Royal Oak. Tim, the landlord, is a fine chap and you’ll be well looked after!). Then on to Marlborough, through Aldbourne and Axford. In town, if there’s still 6X from wood at the Lamb, that should be your first stop. Spent many happy evenings in Marlborough….!
Plenty of accomodation options around as well. You could look out towards Preshute or Manton as well.
Next day, head up through the Fyfield/Rockley area towards Lyneham, then home via the Somerfords.
As to exact roads, best bet is to get on your preferred route planner and look for the B roads. It’s pleasantly hilly around there, nothing too brutal, and lots of lovely country to explore!