Grey Field Slug (Deroceras (Deroceras) reticulatum)

Grey Field Slug (Deroceras (Deroceras) reticulatum)

Observation - Grey Field Slug (Deroceras (Deroceras) reticulatum). Description: On wet paving slab outside isolated building. A medium-sized slug with no obvious keel. Tail tapering gradually to a point. On http://www.field-studies-council.org/media/706528/aidgap_slugs_key_test_version_2013.pdf seems to key out as Ambigplimax nyct

On wet paving slab outside isolated building. A medium-sized slug with no obvious keel. Tail tapering gradually to a point.

On http://www.field-studies-council.org/media/706528/aidgap_slugs_key_test_version_2013.pdf seems to key out as Ambigplimax nyctelia but I harbour some doubts.

Edit: photo added - don't know what happened to it first time round.
Edit: changed to match Steve's ID. Many thanks.