Kammala wannan jumla: Cunningham ya yi tsayayya da rabuwa da Scotland. A lokacin da ya bukaci, House of Commons ya yarda da gyare-gyare ga Dokar Scotland 1978 cewa mafi rinjaye da suka yi "a'a" a cikin
zaben raba gardama na 1979 game da kafa Majalisar da aka ba da izini zai kasance aƙalla kashi 40 cikin ɗari na masu zaɓe na Scottish, in ba haka ba za a iya janye shawarar kuma a soke Dokar ta hanyar doka. Kodayake "yes" ya sami rinjaye na waɗanda suka jefa ƙuri'a a cikin kuri'ar raba gardama, kamar yadda "a'a" ya zama kashi 32.9 cikin ɗari na masu jefa ƙuri'a, gwamnatin Kungiyar kwadago ta yanke shawarar ba za ta ci gaba da rarraba ba. Wannan ya sa Jam'iyyar Scottish National Party ta janye goyon bayanta ga gwamnatin 'yan tsiraru. Sannan 'yan adawa masu ra'ayin mazan jiya sun gabatar da kudirin rashin amincewa, wanda aka kayar da gwamnati da kuri'a daya. Jam'iyyar Conservative, wadda ta yi tsayayya da rarraba, ta lashe babban zaben da ya biyo baya; An soke Dokar Scotland a watan Yunin 1979.