"Warwick" commissioned in March 1918 and saw action in the last months of World War I. She took part in the raid on Zeebrugge in April, the attempt by the RN to blockade Germany's U-boat force stationed in Flanders. She also participated in the second raid on Ostend on 10 May and was heavily damaged by a mine, breaking her back, and had to be towed back to Dover by .