British merchant ship Coultarn torpedoed and sunk according to the War Cabinet Weekly Résumé No. 83 of the Naval, Military and Air Situation 27 March-3 April 1941

An item reported that on 30 March was torpedoed and sunk by an enemy submarine the British merchant ship Coultarn, tonnage 3,579 tons, loaded with -, underway from Hull, England to Nobile, part of convoy no, on the position 250 miles south west of Iceland. Of the crew were 39 men saved, 2 were missing.

Source

National Archive UK. CAB-66-16-1.