Dottin, whose great-grandfather John Walter (d. 1736) had sat for Surrey, 1719-27, achieved a measure of personal notoriety while still a captain in the Life Guards.
At the 1826 general election he offered again as a supporter of the Liverpool ministry and opponent of Catholic claims. Rumours of an opposition came to nothing and he was returned unopposed.
At the 1830 general election he offered again. Rumours that an opposition would be mounted against him on the slavery issue and on account of his failure to present a petition against the friendly societies bill came to nothing. (A supportive newspaper contended that a mishap had occurred in the petition’s transmission and that he had privately lobbied ministers against the measure.) He was again returned unopposed.
At the 1835 general election Dottin was persuaded to offer again for Southampton and was reportedly returned free of expense after a contest.
