Hi Mick
Welcome to Poms in Oz.
This is long shot, but please see this link:
http://www.saltersboats.com/
There is a photo of Peter Hammond, who owns Salters Boats in Fremantle, it seems. His blog speaks of many years experience with commercial fishing, which might - just might - suggest a hook-up with Grimsby, perhaps?
Also, although it is impossible to be sure from the two pix, there might be similarlities in the facial features? The nose looks roughly the same in both pix, ditto hair, and maybe also the quite square jaw?
I found him via using Google Australia and telling it to search Australian web pages only. Then I told it Peter Hammond + Perth. LOADS of links came up so it woould be worth your while to repeat the search. However, generally, people who are involved with boats have been so since a young age.
Best wishes
Gill