But the sun was out, and I opened the shutters over the windscreen and the van soon warmed up, and by after breakfast the tap at the services had thawed, so we were able to refill. We decided not to go too far today and are at yet another Camping-Car park in Villefranche-sur-Saone, which we got to just after 12, having stopped at a random Super-U en route where I got a baguette that was still warm (among other things)!
We managed to see most of our church service, and after lunch the Swan Whisperer went for a walk which turned out to be far longer than he meant as he said the maps lied and he couldn't come back the way he had hoped.
We are on electricity tonight so hope to be able to set the heating to 7 or 8 C to avoid a recurrence. It shouldn't be quite so cold, either.