Yep, happened here and an absolute cock up.
Roads/pavements were dug up which meant people couldn't get their cars in/out of their drives.
They put some kind of liner in the existing pipe between the mains under the pavement and our meter (which is inside). They couldn't thread it through in one go as it was too far to push, so they dug two holes on the drive, which they botched to reinstate (rough and untidy).
They came into the house to check it over and turned on the gas.
All OK, or so they told us.
Then we started having trouble with our boiler which kept cutting out with error messages. Got our emergency boiler repair firm out to check it over and they almost immediately discovered our gas supply was under-pressure which is what was causing the boiler error. They couldn't do anything themselves but logged a fault with the national grid network people, and then turned off our gas.
National grid people came a couple of days later, checked the pressure themselves and confirmed it was too low. Apparently the liner had narrowed the pipe too much so not enough gas could get through. They dug a new channel the entire length of our drive for a new pipe. But they were only "diggers" apparently and couldn't put a new pipe in. For that, we needed a different team who came the next day, laid the new pipe but apparently weren't allowed to "connect" it at either end. So that was another team the next day, who connected it. Then it was another few days until yet another team came to reinstate our drive, and again, made a right shoddy job of it.
So, all in all, a very disruptive and inconvenient job, most of which down to the bodge merchants who put in the liner and didn't check the pressure (apparently they should have done, and probably did, but decided to leave it anyway so they didn't have to spend time sorting it themselves!!).