 Basilisk spent the next two months escorting convoys and patrolling in the English Channel and the North Sea. The ship and her sister Blanche were escorting the minelayer Adventure on the morning of 13 November in the Thames Estuary when they entered a minefield laid the night before by several German destroyers. Adventure and Blanche both struck mines; the latter lost all power and later capsized whilst under tow. Basilisk continued to escort convoys and patrol until April 1940 when the Norwegian Campaign began. On 24 April, the ship, together with the destroyers Wren and Hesperus, escorted the battleship Resolution to Narvik on 24 April. In early May, she escorted the troopship Empress of Australia to Norway. Basilisk supported the Allied landings on 12 – 13 May at Bjerkvik during the Battle of Narvik.
