In the 2019 United Kingdom general election he stood as an independent candidate against Boris Johnson in the Uxbridge and South Ruislip constituency.
From 1979 to 1982 Tobin held a postdoctoral lectureship at the University of St Andrews in Scotland and from 1982 to 1987 a position at the Marseille Astrophysics Laboratory.
He studied the past Transit of Venus expeditions and wrote a biography of the French physicist Léon Foucault.
[5] He returned to New Zealand in 2008 to take up a visiting Erskine Fellowship at Canterbury, in 2012 to attend the Starlight Conference in Tekapo and the 50th anniversary of the Mt John University Observatory in 2015.
[1] Tobin stood as a candidate in the Uxbridge and South Ruislip constituency against Boris Johnson in the 2019 general election.
[1][2] Although he was a British citizen he had not been resident in Britain for more than 15 years making him ineligible to vote in the 2016 Brexit referendum or the general election.