I've been sent a link to a web page for Harker built vessels, hopefully of use to some members

http://www.knottingley.org/history/harkerbuilt.htm

A good piece of research.
I have 2 extra oddments, the barge HUNT'S MONICA in 1935 and tanker CLYDE ENTERPRISE in 1960 (became sand dredger TAYSAND from 1996).
Possibly built elsewhere but must have seen them ascribed to Harker.

HUNT'S MONICA listed as MONICA, y.n. 76, CLYDE ENTERPRISE built by Yorkshire DD, y.n. 31 as HUMBER ENTERPRISE.

Thanks Mike, my d/base corrected!

CLYDE ENTERPRISE in service at Greenock. Late 1960's if I remember correctly.