British War Cabinet approved building of 4 patrol boats on 26 June 1917

An item reported that the War Cabinet on Tuesday 26 June 1917 considered proposals (Paper GT.-1133) done by the Board of the Admiralty dealing with an increased programme to be completed by the end of 1918 als regarded War Cabinet No. 58. Factors as the expected strength of the German navy, the need for destroyers for anti submarine warfare and no disturbingof the merchant shipbuilding resulted in the War Cabinet approving the laying down of 4 patrol boats.

Source

The National Archives, Kew Gardens, England CAB 37-23-3-17