Nest and picture of a Wood mouse.
In a rarely used kitchen (in a country house).
The nest was dug in a old sliced bread loaf. To make the "straw" the Wood mouse split used matches.
This shell is very likely a remain of a relictual population, now probably extinct, of the French Atlantic coast.
I could only find reference to that population in french : https://doris.ffessm.fr/Especes/Cerithium-vulgatum-Cerithe-goumier-1177
Here is a translation of the interesting part : " It appears that this species [Cerithium vulgatum] lived until recent times on the Atlantic coast [of France]; some rolled or broken shells were found on the beaches of La Baule and its surroundings."