Qoraal sii-socda faqradan - Dabayaaqadii 1970-yadii Fergusson wuxuu si firfircoon ugu biiray siyaasadda Muxaafidka. Isaga oo si adag uga soo horjeeda kala wareejinta, wuxuu ka hadlay shirarka isagoo isku dayaya inuu ku qanciyo Conservatives-ka inay ka soo horjeestaan Golaha Scottish-ka; ka dib ololahan guusha ka dib, wuxuu xubin ka ahaa ololaha "Scotland Says No" ee aftida kala wareejinta
Waxaad Doorashadii Baarlamaanka Yurub ee 1979kii, Fergusson wuxuu ku tartamay deegaanka Strathclyde West, oo u muuqday mid aamin ah shaqada; si kastaba ha noqotee, burburka codadka shaqada ayaa u arkay isaga oo loo doortay 1,827 cod.