Kammala jumla mai zuwa: Lamont ya tsaya ga jagorancin Labour na Scotland bayan da Iain Gray ya yi murabus sakamakon rashin nasarar jam'iyyar a zaben majalisar dokokin Scotland na 2011; rashin nasararsa na biyu a jere. Bayan nazarin yadda za a tsara Jam'iyyar Labour a Scotland, ta zama ta farko shugaban shugabanci. Ta bayyana cewa Labour ta rasa zaben 2011 saboda ta rasa shugabanci, kuma ta fara nazarin manufofin Labour na Scotland kan batutuwa kamar rarrabawa da kuma sadaukar da jam'iyyar ga ayyukan jama'a na kyauta. Bayan sanarwar da Gwamnatin SNP ta yi game da wani
a cikin raba gardama kan 'yancin Scottish, ta kasance muhimmiyar mahimmanci a cikin Better Together campaign; ƙungiya ta ƙungiyoyi da ke neman ci gaba da Scotland a cikin United Kingdom. Ta yi murabus a matsayin shugabar kungiyar kwadago ta Scotland a watan Oktoba na shekarar 2014, inda ta sanar da hakan a wata hira da aka yi da "Daily Record" inda ta yi ikirarin cewa manyan jami'ai a cikin Jam'iyyar Labour ta Burtaniya sun yi watsi da kokarin da ta yi na sake fasalin jam'iyyar ta Scotland, kuma ta bi da ita "kamar ofishin reshe na London". Bayan zaben shugabanci don maye gurbin ta, tsohon Sakataren Harkokin Wajen Scotland Jim Murphy ya gaje ta a watan Disamba na 2014.