British cruiser HMS Undaunted underway to the Nore according to the Weekly Intelligence Summary (W.I.S.) No. 10 dated 12 March 1921

Arethusa-class. Warshipsresearch.blogspot.com

An item dated 12 March reported the arrival of the British cruiser HMS Undaunted at Devonport returning from the Mediterranean and leaving for the Nore.(1)

Note

1.British Arethusa-class light cruisers, preceded by Active-class, succeeded by C-class. Consisted of Arethusa, Aurora, Galatea, Inconstant, Penelope, Phaeton, Royalist and Undaunted. Laid down by Fairfield Shipbuilding and Engineering Company, Govan, Scotland on 21 December 1912, launched on 28 April 1914, commissioned in August 1914 and sold to be broken up on 9 April 1923.

Source

The National Archives, Kew Gardens, England CAB-24-121-21