Skinny brown slug I/D

[Pigeon feather]

Hi, can anyone i/d this odd looking slug I found on the inside door of my shed? it was also crawling with what looked like tiny white mites but they all scattered when exposed to the light sorry about the quality of the pic!

[Lance Morgan]

Think this is just a thin garden slug

[Dogghound]

Hard to say, it looks like a juvenile Arion circumscriptus, although there are a couple of similar species. They can vary in colour as they grow.

[Tiggrx]

The keel down the back would suggest something in the family Limacidae - I would guess Milax sp.

[Pigeon feather]

Thanks for the replies guys still not quite sure what it is though I guess if it's a juvenile it may be difficult? or perhaps it's my blurry pic anybody know what the white mites are on it? I think I've seen these on snails before too.

[bugbotherer]

I could also be an adult Deroceras slug. One thing for sure it's not an Arion