British dredger Coquet Mouth mined according to the War Cabinet Weekly Résumé No. 45of the Naval, Military and Air Situation 4-12 July 1940

An item reported that on 4 July the British dredger Coquet Mouth, tonnage tons 477 tons, loaded with ... , underway from ... to ... was mined North of Blyth. Three crew members were killed.

Source

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