The Denholm pennant was flown above the Troll Carriers A/B flag.
The separately referenced B328 funnel is noted for Port St. Catherine in June 1967 and Fort Warwick, associated with the managed Buckingam Tanker Co.
Formed in 1958, this company took over the management role previously listed under J. & J. Denholm Ltd. and later became Denholm Ship Management Ltd. Cottesbrooke Shipping Co. Ltd. is listed as a subsidiary.
UK, Glasgow.
Keep the explicit scope label independent; no alias or company identity is inferred.