Thats not a pothole Tom, thats a caving system - there’ll be people in anoracks gathering there soon!
Theres quite a few on the M1, plus a few nasties on the slip roads, eg where the A500 joins the M6 northbound through the roadworks is bad. Just one long pothole.
An awful lot seem to be around where they are already doing “smart motorway” roadworks. Not sure if its length of time they taking or something else but I dont remember potholes this bad around previous roadworks.
As for lane closures, they keep shutting sections of motorway overnight to 1 lane but never use it to fix the potholes. Only ever to fiddle with signs it seems.