▁He ▁formed ▁a ▁good ▁relationship ▁with ▁the ▁leader ▁of ▁the ▁Conserv ative ▁opposition ▁in ▁the ▁L ords , ▁the ▁Mar qu ess ▁of ▁Sal is bury . ▁Through ▁general ▁consult ation , ▁Add ison ▁developed ▁new ▁gu idel ines ▁for ▁pe ers , ▁particularly ▁with ▁regard ▁to ▁declaration ▁of ▁interests . ▁He ▁was ▁also ▁Secretary ▁of ▁State ▁for ▁Domin ion ▁Affairs ▁in ▁Att lee ' s ▁first ▁cabinet , ▁direct ing ▁the ▁transformation ▁of ▁the ▁Domin ion ▁Affairs ▁Office ▁into ▁the ▁Office ▁of ▁Commonwealth ▁Rel ations ▁and ▁playing ▁an ▁instrument al ▁role ▁in ▁Labour ' s ▁early ▁anti - imper ial ist ▁policies ▁and ▁the ▁strength ening ▁of ▁the ▁British ▁Commonwealth . ▁In ▁ 1 9 4 6 , ▁he ▁became ▁the ▁first ▁Labour ▁politician ▁to ▁be ▁made ▁a ▁Knight ▁of ▁the ▁G arter . ▁As ▁his ▁health ▁began ▁to ▁d eter ior ate ▁he ▁with d rew ▁from ▁foreign ▁affairs ▁in ▁ 1 9 4 7 , ▁subsequently ▁holding ▁a ▁number ▁of ▁s ine c ure ▁positions ▁in ▁combination ▁with ▁his ▁leadership ▁of ▁the ▁L ords , ▁until ▁Labour ▁lost ▁office ▁in ▁October ▁ 1 9 5 1 . ▁ ▁Family ▁Lord ▁Add ison ▁married ▁first ly ▁I so bel , ▁daughter ▁of ▁Arch ib ald ▁Gray , ▁in ▁ 1 9 0 2 . ▁They ▁had ▁two ▁daughters ▁and ▁three ▁sons . ▁I so bel , ▁the ▁daughter ▁of ▁a ▁wealth y ▁Scottish ▁business man ▁and ▁sh ipping ▁agent , ▁supported ▁her ▁husband ▁mor ally ▁and ▁finan cially ▁when ▁he ▁emb