▁Conserv ative ▁victory ▁in ▁the ▁ 1 9 7 9 ▁election ▁at ▁which ▁point ▁he ▁returned ▁to ▁private ▁practice . ▁With ▁Labour ▁in ▁O pp osition ▁he ▁continued ▁as ▁their ▁Sp ok esp erson ▁for ▁Scottish ▁Leg al ▁Affairs ▁until ▁ 1 9 8 4 . ▁ ▁In ▁December ▁ 1 9 8 4 , ▁Mc Cl us key ▁was ▁appointed ▁a ▁Senator ▁of ▁the ▁College ▁of ▁Justice , ▁a ▁judge ▁of ▁the ▁Court ▁of ▁Session ▁and ▁High ▁Court ▁of ▁Just ici ary , ▁Scotland ' s ▁supre me ▁courts . ▁Al ready ▁being ▁a ▁peer , ▁he ▁used ▁his ▁noble ▁title ▁whilst ▁sitting ▁on ▁the ▁Ben ch . ▁He ▁was ▁the ▁first ▁serving ▁judge ▁to ▁deliver ▁the ▁BBC ' s ▁Re ith ▁L ect ures , ▁which ▁he ▁gave ▁in ▁ 1 9 8 6 ▁on ▁Law , ▁Justice ▁and ▁Dem ocracy ▁in ▁which ▁he ▁discuss es ▁his ▁ideas ▁of ▁what ▁jud ges ▁should ▁and ▁should ▁not ▁be ▁involved ▁in . ▁ ▁In ▁ 1 9 8 9 ▁the ▁University ▁of ▁D und ee ▁gave ▁him ▁an ▁honor ary ▁doctor ate . ▁In ▁ 1 9 9 2 ▁he ▁pres ided ▁over ▁the ▁trial ▁of ▁Paul ▁Ferr is , ▁who ▁was ▁accused ▁of ▁a ▁gang land ▁murder . ▁The ▁trial ▁last ed ▁ 5 4 ▁days ▁and ▁cost ▁£ 4 ▁million , ▁which ▁at ▁the ▁time ▁was ▁the ▁longest ▁and ▁most ▁expensive ▁criminal ▁trial ▁in ▁Scottish ▁legal ▁history . ▁ ▁He ▁was ▁involved ▁with ▁helping ▁saf egu ard ▁the ▁independence ▁of ▁the