Snail for ID

Snail for ID

Observation - Snail for ID - UK and Ireland. Description: I first recovered some of these shells two years ago when I was planting some trees in a small relic reed bed. (We were working on a project to improve the condition of the habitat and in this case planting a screen to block an undesirable view). The shel

I first recovered some of these shells two years ago when I was planting some trees in a small relic reed bed. (We were working on a project to improve the condition of the habitat and in this case planting a screen to block an undesirable view). The shells where all buried at a depth of 25cm under the soil in a distinct layer. I have not found any alive in the reed bed. I assume they would have been present alive a good number of years ago. It is a dry reed bed currently so I am not even sure whether they are aquatic or terrestrial. Can they tell me any thing about the environment at the time they were alive and the species please?