Roy Mason , Baron Mason of Barnsley , PC , DL ( 18 April 1924 -- 19 April 2015 ) was a British Labour politician and former Cabinet minister who was Secretary of State for Defence and Secretary of State for Northern Ireland in the late 1970s .
Roy Mason , Baron Mason of Barnsley , PC ( 18 April 1924 -- 20 April 2015 ) , was a British Labour politician and former Cabinet minister . He was Secretary of State for Defence and Secretary of State for Northern Ireland in the late 1970s .