There are some long-term roadworks on the A1 in Bedfordshire, with changes in speed limits and average speed cameras:
A1 Northbound: Speed limit now 40mph from Biggleswade North roundabout to Sandy.
A1 Southbound: Speed limit now 40mph from Sandy to Biggleswade North.
New Northbound Average Speed Cameras: 40mph limit
https://waze.com/en-GB/editor?env=row&lat=52.12422&lon=-0.29216&marker=true&s=4672994778389&zoomLevel=17&cameras=16184884
https://waze.com/en-GB/editor?env=row&lat=52.12422&lon=-0.29216&marker=true&s=4672994778389&zoomLevel=17&cameras=16184885
https://waze.com/en-GB/editor?env=row&lat=52.08905&lon=-0.26972&marker=true&s=4672994778389&zoomLevel=17&cameras=16184886
Existing speed cameras covered and out of service:
https://waze.com/en-GB/editor?env=row&lat=52.10135&lon=-0.27265&marker=true&s=4672995302677&zoomLevel=17&cameras=5056 (Northbound was 60)
https://waze.com/en-GB/editor?env=row&lat=52.10135&lon=-0.27265&marker=true&s=4672995302677&zoomLevel=17&cameras=5624 (Southbound was 60)
https://waze.com/en-GB/editor?env=row&lat=52.10135&lon=-0.27265&marker=true&s=4672995302677&zoomLevel=17&cameras=5624 (Northbound was 50)
https://waze.com/en-GB/editor?env=row&lat=52.12058&lon=-0.29063&marker=true&s=4672995302677&zoomLevel=18&cameras=15860986 (Southbound was 50)
The northbound carriageway is under average speed cameras for its whole length. I only spotted one average camera on the southbound: I’ll look for its parter(s) on my next run down that way.
There are also long-term works north of Sandy roundabout with a 40mph limit in effect:
The southbound limit starts further north, but there isn’t a node to allow me to select the correct stretch. It begins at approximately the exit from the car sales garage here:
https://waze.com/en-GB/editor?env=row&lat=52.14517&lon=-0.30010&marker=true&s=4672995302677&zoomLevel=19
Hope that helps, and sorry it’s a lot of updates!