In September 1939 she was requisitioned by the Admiralty for minesweeping duties once more and commissioned as HMS Queen of Thanet, pennant number J30.[3] In May 1940 she took part in the Dunkirk evacuation rescuing 4,000 men in four trips. Of that number, 2,000 were transferred from the ex-LNER steamer Prague, after the latter had been damaged by near misses from shells and dive bombers off Gravelines.[4] For Operation Overlord in June 1944 she was stationed at Selsey as the Mulberry Despatch Control Ship. After the war she was returned in 1946 to her owners to recommence excursion work around the Thames Estuary.
Post War
In January 1949 she was sold to Red Funnel and transferred to Southampton. After refitting at Thorneycroft's yard at Northam she was commissioned in the spring as the company's second Solent Queen. For the next two years she operated excursions from Southampton in the summer. In June 1951 while slipped for survey and repair, she caught fire and was written off as a constructive loss.[5] She was scrapped by Dover Industries at Dover Eastern Docks in 1951.[6]