In Gloucestershire they've been building a new cycle route that's meant to end up going Bishop's Cleeve - Cheltenham - Gloucester - Stroud.
https://www.gloucestershire.gov.uk/major-projects-list/gloucestershire-cycle-spine/
It's been slow going, but the Gloucester to Cheltenham stretch that is completed is actually pretty good, and even most regular cyclists use it in preference to the road.
They've even taken away significant car space, with the remaining one lane each way being fairly narrow, and with a 30 limit the whole way (used to be 50 away from housing). In the screenclip below, the green of the cycle track more or less indicates the width that the cars have lost.
StreetView isn't up to date, but this is an example, showing proper cycle priority at a side road.
View attachment 803074
https://maps.app.goo.gl/RBt14A9cmVbti4KL8
They are currently working on Cheltenham to Bishop's Cleeve, which is sorely needed from a cycling point of view. There's the one direct A road via Racecourse roundabout, and it's both narrow and fast, and the two alternatives (B4632 to Prestbury and Hyde Lane to Swindon Village) are both significantly further and not all that much better to ride on at busy times.
Gloucester to Stroud is being still planned, but the indications are that it will largely follow a current cycling route (Sharpness canal towpath, cross the A38 at Whitminster, and into Stroud on the Ebley bypass cycle track (off highway).