'Lark' was a British unrealised operation by the Special Operations Executive within the 'Maundy' series of undertakings to lay mines in the coastal waters near Trondheim in German-occupied Norway (February 1942).

With its personnel comprising two Norwegian agents of the Special Operations Executive, O. K. Sættem and A. Christiansen, the operation was to have used rowing boats to lay the mines supplied by the Royal Navy.