Dusky Slug (Arion subfuscus)

Dusky Slug (Arion subfuscus)

Observation - Dusky Slug (Arion subfuscus). Description: Found under paving stone. Can anyone confirm the ID, please? Edit: additional photo added. Edit: title changed to match Cambridgeshire's ID; many thanks.

Found under paving stone. Can anyone confirm the ID, please?
Edit: additional photo added.
Edit: title changed to match Cambridgeshire's ID; many thanks.