Who can offer details for the tug THOR at Grimsby in Harvey colours but showing an Arthur Smith web address on her. Looks like another German import maybe.
I have not been across there for quite some time so rather out of date with the fleet.

Thanks to detective work by Terry Thwaite, her call sign is the same as that carried by Harvey's JADI so this must presumably be a renaming as she matches her in photos.
Current photo as THOR is on the SeaTheShips website.
Here is JADI at work 08/02/2006

JADI at Grimsby, but with earlier funnel colours.