ROCK

[teesships]

ROCK, United Kingdom, ??gt, completed London and Rochester, Frindsbury, 1961
1990 withdrawn from service - sold to private owners

A bit of a nebulous link to Dunston at Thorne simply because it is stated they designed this class of small Medway coasters.
See: http://www.hcmoorings.org/vessels-at-hcm/rock/

On the Thames - 15 July 2013:

Ron

[northeast]

Interesting Ron, as they don't seem to have built any of the class at Thorne.

[magoonigal]

Better link was that she was owned by Roy Mills of Goole between June 1980 and February 1986.