Tree Slug (Lehmannia marginata)

Tree Slug (Lehmannia marginata)

Observation - Tree Slug (Lehmannia marginata) - UK and Ireland. Description: A long, thin slug with an obvious long keel. Found on isolated building. Confirmation of ID would be appreciated. Edit: Changed to match Christian Owen's ID. Many thanks.

A long, thin slug with an obvious long keel. Found on isolated building. Confirmation of ID would be appreciated.
Edit: Changed to match Christian Owen's ID. Many thanks.