After the commissioning, the
Valerian completed security tasks off the British east coast, being used in 1917 and 1918 mainly to monitor coastal
convoy routes and the
mine barriers of the North Sea Mine Barrage. The sloop was not involved in combat operations, although it was briefly suspected that she had sunk the German submarine in the northern North Sea in July 1917. However, this submarine was sunk by the British submarine .
Valerian recommissioned at Devonport on 29 December 1920 and was assigned with
sister ship HMS Wistaria to the
America and West Indies Station, based at the
Royal Naval Dockyard (HMD Bermuda) where she arrived on 2 April 1921, On 21 October 1922,
Valerian was damaged in a hurricane at Bermuda. On
Dominion Day, 1 July, 1924,
Valerian crew members paraded at the
Plains of Abraham,
Quebec for the inauguration of the
Cross of Sacrifice erected in remembrance of the Canadians lost in the First World War. On 20 October 1925 she arrived at
Baltimore to support Britain's
Schneider Trophy team. The fastest British entry, the
Supermarine S.4, crashed into the water on 23 October and
Valerian assisted in the salvage.
Valerian returned to Bermuda at the conclusion of racing. == Loss ==