Following some research which basically involved getting in touch with the owners I have now found out more about the above vessel.
As noted below tThe vessel was built by J.S Watson, Gainsborough on the River Trent in
1939, her yard number was 1512, and she was measured as 84grt, 48nrt, 72ft x
22ft. O.N. 166890
She was built on behalf of the Kings Lynn Conservancy Board and was named