He was s of Maj Peter Bridges PLUMPTRE 1916-95 (gs of John Bridges PLUMPTRE 1832-88 who was f of 20th Baron FITZWALTER 1860-1932) and Maude Helen Mary 1921-2015 d of Geoffrey Henry BAIRD 1871-1949 of Goodnestone, Kent (s of Thomas James Carpendale BAIRD 1828-75 and Gertrude Emily 1832-95 d of Ver Rev Hon Robert William Henry MAUDE 1784-1861 (s of 1st Viscount HAWARDEN 1729-1803) and Hon Martha Elizabeth Mary PRITTIE c1802-87 gd of 1st Baron DUNALLEY 1743-1801) and Helen Jane BLIZARD 1892-1981. He m 1975 Christine HAMILTON, and had a son and a dau as above.