At the
1695 English general election Thynne was put up as a candidate for
parliament at
Weobley but in an unpredictable borough was unsuccessful. Guy was a
Whig, while Thynne was a
Tory. Thynne supported the motion on 26 February 1702 which vindicated the Commons' proceedings in the impeaching the Whig lords. He was returned again as MP for Weymouth and Melcombe Regis at the
1702 English general election. He voted against agreeing with the Lords' amendments to the bill increasing the time for taking the oath of abjuration on 13 February 1703, but in April 1703, he fell ill, and was described by his father as 'overrun with the spleen'. He voted for the Tack on 28 November 1704. At the
1705 English general election, he was returned again as Tory MP for Weymouth and voted against the Court candidate for Speaker on 25 October 1705. He became less active in Parliament. At the
1708 British general election he was returned for two constituencies, Weymouth and Weobley, and chose to sit for Weymouth, before his sudden death. ==Later life and legacy==