Do they ever connect to cabs up to mains supply during cab installation, just that apart from one or 2 cabs they have filled the trenches and tarmac'd over them , suggesting power through ducting into cab ,(although maybe isolated ), and just waiting the fiber links to be fed through the ducting
The few sites of cab installs where the cabs are in place ducting in most of the trenches filled apart from presumably where the power cable is , maybe suggesting that it wasn't connected for some reason, maybe no one on the team was authorized to perform a live mains connection that feeds street lights and illuminated road signs
And in the last day or so this "3 BT ROLLING WORKS, NO EXCAVATION" have started appearing on the council's street works web page , i assume this to be the fibre cabling ,