From the Admiralty War Diary for 9 December 1941:
British Air Operations
Hudsons of Coastal Command today carried out successful attacks against enemy shipping off Alesund and Den Header, four ships being hit or set on fire.
On a later page of the same day's diary:
British Air Operations
6 Bomber Command aircraft attacked targets in NW Germany today, and one claims a direct hit on a tanker in the mouth the Ems. Coastal Command aircraft continued their attacks on shipping off the coast of Norway.
From the diary of the Seekriegsleitung for 9 December:
Norwegian Steamer »Bjoenn« (5,500 GRT) carrying 9,000 tonnes of ore was set on fire by an enemy aircraft in the latitude of Bud. The ship had to be abandoned in view of the stormy weather. 5 Norwegians missing.