Swedish merchant ship Bissen sunk by enemy submarine according to the War Cabinet Weekly Résumé No. 45of the Naval, Military and Air Situation 4-12 July 1940

An item reported that on 7 July the Swedish merchant ship Bissen, tonnage 1,515 tons, loaded with ... , underway from ... to ... was torpedoed 90 miles outh of Bantry Bay [Ireland?]. Not part of convoy

Source

National Archive UK. CAB-66-9-42.