[1] Unlike the rest of the Cambrian subclass, Canterbury was armed with six torpedo tubes instead of the usual four.

From 1916 to 1918, she was assigned to the 5th Light Cruiser Squadron, operating as part of Harwich Force in the North Sea to defend the eastern approaches to the Strait of Dover and English Channel.

On St George's day, 23 April 1918, she was present at the great naval raid on Zeebrugge and Ostend.

She was recommissioned again at Portsmouth in May 1924 to serve in the 2nd Cruiser Squadron in the Atlantic Fleet, before beginning another refit in June 1925.

[1] Canterbury recommissioned out of the Nore Reserve in November 1926 for another tour of duty in the Atlantic Fleet with the 2nd Cruiser Squadron.