I have just heard from CWaC Highways;
“Here is a brief update.
The carriageway collapse occurred out of office hours, and was dealt with by our emergency standby officer.
The traffic management installed was purely to address the emergency situation.
We raised this with United Utilities, but they did not accept responsibility for the situation.
We have, therefore, raised a job for the area to be excavated and the collapse to be investigated; this should be sometime next week.
In the meantime, we have arranged for the traffic management to be improved and for a full road closure and diversion to be put in place.”