They came about a month ago, and sprayed a blue line around our exterior water stopcock cover.
Since then a number of high-viz-jacket-wearing-workers have come to inspect. Some held clip-boards, some measured, and others just looked and took photographs.
Then yesterday I heard some banging outdoors, so I went to talk to the man who was digging a hole.
There was a leak in the stopcock he told me, and it had to be replaced.
I asked if the water would be turned off. He said maybe for a couple of minutes, but no more. I filled the kettle just in case.
When done he knocked on the door, and proudly showed me the replaced flagstone, as well as some tarmac around the surface of the new cast-iron inspection cover. He assured me that another man would come the next day and replace the tarmac with concrete, which is what the above photo now shows.
The finish is perfect, and a very aesthetic looking mend has been left for us to admire. No cat or dog has walked though the fresh concrete, nor did I scratch 'Cro' into the wet surface. I almost wish I had.