Glass snails

Glass snails

Observation - Glass snails - UK and Ireland. Description: I picked up these glass snails to see if I could id them. The big one (7mm) seems to have a bigger umbilicis than the others, but is not particularly flattened. Are they all likely to be Oxychilus alliarius ?

I picked up these glass snails to see if I could id them. The big one (7mm) seems to have a bigger umbilicis than the others, but is not particularly flattened. Are they all likely to be Oxychilus alliarius ?