In answer to Hornbeam, whilst no longer living on Teesside I continue to be a regular visitor and spent most of my working life in Middlesbrough. George mentioned the "Union" having been Smith Hogg's "Rowanburn". I was associated with Smith Hogg for over 30 years, and a director of the company for many of them. It was my interest in the "Rowanburn" which prompted a closer look at the South Stockton Shipbreaking Co. Ltd.
Smith Hogg & Co Ltd were founded in 1904 and Herbert Hogg, one of its two founders, jotted down some of his memoirs in 1966 at the age of 87. You may be interested in these comments of his:-
"The "Rowanburn" we sold to Cardiff owners in 1929 and they attempted to lose her by putting her ashore on the Norwegian coast. [for further info, she grounded near Harstad when returning from one of the Kara Sea expeditions on charter to the Soviets]. She came to Tyne Dock Engineering for repairs and we had to foreclose - which we should have done at the port of discharge, when we could have collared the freight. As it was we had to put her through [Lloyd's Register] survey, which cost us £6,000, and since she could make no money under British flag owing to high insurance costs we put her under Finnish flag, calling her "Union". We made money and got our losses back and sold her for breaking in 1936."
Herbert Hogg also kept voyage records which record the "Union" as follows:-
Sailed Amsterdam 4/3/36 1am - stranded breakwater
Arrived Lisbon 10/3/36
Entered drydock Lisbon for temporary repairs 12/3/36 pm
Departed Lisbon 24/3/36
Arrived London 30/3/36 4am
Sailed London after discharge 1/4/36 6pm
Arrived Hartlepool 3/4/36 am
Docked at Grays
Sold
By going to Grays suggests it was thought repairs may have been economic but obviously not and she moved round to Thornaby for demolition.
Haven't checked if the link to the photo in the Stockton Archive is one of those taken by Aerofilms, but, if you haven't looked, there are some interesting shots over Stockton and Thornaby, taken in the period mid 1920's to say 1950, on the website "britainfromabove.org.uk", which has around 95,000 images (from a collection of over 1 million negatives) available on-line.