In 1818, Dottin, a Tory, entered Parliament for the
rotten borough of Gatton. He failed to be elected in 1820 at Southampton, despite heavy expenditure. In 1826 he was returned there unopposed, and again in 1830. In 1831, he did not stand, for health reasons. Re-elected in 1835, in a contested election, he remained in Parliament until he retired in 1841. ==Railway director==