Rubuta ci gaba don wannan sakin layi - Jenkins ya zama mai aiki a cikin siyasa na gida, yana wakiltar Jam'iyyar Labour a Majalisar Monmouthshire County. Ya kuma kasance mai ra'ayin gurguzu mai karfi, yana neman canji mai sauri da tashin hankali. A lokacin yajin aiki na 1926
an kama shi a kan tuhume-tuhumen da ake jayayya, aka kai shi gaban majistare kuma aka tura shi kurkuku na watanni tara, kodayake wannan bai hana shi komawa Kwamitin Gudanarwa na Kasa na Jam'iyyar Labour ba.