OK, so I can, and probably will contact Saur for some info but a) it’s Sunday and b) the SF crowd is a helpful and knowledgable lot so I thought I’d ask here as well 
About 18 months ago some work was done on the water mains in the street - including, for us at least, the placement of a new stopcock within our boundary but outside the property - this was done by sinking a plastic box about 40x30x30cm into the graven drive. It has a cover which has some polystyrene insulation.
I assume this is so that the property can be isolated without needing to enter - which is OK by me as there’s only someone here about 10% of the time.
Does anyone know who’s responsibility the box and piping are? It’s on my property so is it mine? However it’s between the meter and the network so ?Saur’s - as Saur, like the water companies at home, keep offering me insurance to cover pipework between the street and the house I assume it’s mine.
We’ve arrived a few times to find, to our puzzlement that the lid has come loose.
When my wife was here a couple of weeks ago she noted there was a leak which I fixed yesterday (Saur’s responsibility or not I figured it would only take me a few minutes to sort out which proved to be the case - much quicker than “getting someone out”).
Today I find the lid off again despite making sure it was fitted securely yesterday - but now the mystery is solved (I think).
This is what I found (well, the lid wasn’t all the way to the side and, yes, the gravel badly needs weeding.
If it rains the ground there saturates - it’s gravel and sandy soil but there must be something less permeable not too deep, the box fills and the top gets pushed/floats off on the rising water.
So - does anyone know if I can fix the lid down. There are holes which look like you could put a bolt through but no threads that I could see - underneath there might be a hexagonal recess which would take a nut but there would be little to retain it.
Also - anyone know how they do with frost, the polystyrene is 7-8cm thick, doesn’t look as though it would protect against much frost. I know Breton winters are mild but I don’t really want to arrive to find the water main is split because it has frozen, especially if the lid has lifted off.







