Infinity is supporsed to be enabled immenantly on cabinets in my area. Just outside the street cabinet has appeared blue writing on the road which reads TLU then about 8 or 9 digets. Is this some sign of progress?
Coloured writing on pavements or roads are usually marking buried services. Blue is traditionally water, so perhaps they have marked a water main so that someone doesn't drill into it by accident.
The chances are that somebody has recently done a survey, with the expectation that someone's going to start digging soon.
Have you checked the following websites to see if there is any information on any of them that may help you :-
What county are you in ?
As said previously most likely a survey was done earlier and the blue markings were just a warning that there was a water maiin.
All the different services (gas water etc) are at different depths. The warning could just be to remind the JCB driver not to go too deep.