11 May 1918, bombed by German aircraft off Calais 24 May 1940. Westcott – built by Denny, laid down 30 March 1917, launched 14 February 1918, completed 12 March 1918, sold for breaking up 8 January 1946. Notable as first vessel to be fitted with the Hedgehog depth charge mortar in August 1941. Westminster – built by Scotts Shipbuilding & Engineering Company, Greenock, laid down April 1917, launched 25 February 1917, completed 18 April 1918, sold for breaking up 4 March 1947. Whirlwind – built by Swan Hunter & Wigham Richardson, Wallsend laid down May 1917, launched 15 December 1917, completed 15 March 1918, torpedoed by German U-boat southwest of Ireland, 5 July 1940. Whitley (ex-Whitby) – built by Doxford, laid down June 1917, launched 13 April 1918, completed 14 October 1918, bombed by German aircraft and beached off Ostend 19 May 1940. Winchelsea – built by J. Samuel White & Company, Cowes, laid down 25 May 1917, launched 15 December 1917, completed 15 March 1918, sold for breaking up 20 March 1945. Winchester – built by White, laid down 12 June 1917, launched 1 February 1918, completed 29 April 1918, sold for breaking up 5 March 1946. Windsor – built by Scotts, laid down April 1917, launched 21 June 1918, completed 28 August 1918, sold for breaking up 4 March 1947. Wolfhound – built by Fairfield, laid down April 1917, launched 14 March 1918, completed 27 April 1918, sold for breaking up 18 February 1948. Wrestler – built by Swan Hunter, laid down April 1917, launched 25 February 1918, completed 15 May 1918, mined off Juno Beach 6 June 1944 and written off as constructive total loss, sold for breaking up 20 July 1944. Wryneck – built by Palmers, laid down April 1917, launched 13 May 1918, completed 11 November 1918, bombed by German aircraft off Morea, Greece 27 April 1941. Wayfarer – ordered from Yarrow but not laid down, order cancelled April 1917. Woodpecker – ordered from Yarrow but not laid down, order cancelled April 1917. Thornycroft V and W class The Thornycroft V and W class were two V class and two W class specials built by John I. Thornycroft & Company Limited to Admiralty specifications. They were ordered in pairs six months apart, on 30 July 1916 and 9 December 1916, respectively. They could be recognised by a higher freeboard and shorter mainmast than the Admiralty