Vyner was elected
Member of Parliament for
Great Grimsby in a contest at the
1710 general election. His politics were unclear, but the Tory
Arthur Moore, who was returned with him he election, wrote that he was sure of his support. Vyner was not an active Member, and little was recorded of him in Parliament. In July 1712 he and Moore presented Grimsby’s address of thanks for the terms of the peace, on behalf of the High Church party. He did not stand in
1713 and next stood in 1721, when he was defeated at Grimsby. He was returned as an independent Whig MP for
Lincolnshire at a by-election on 12 February 1724. He was a highly prolific speaker, and became a voluble opponent of successive administrations, acting consistently against them. He was returned again at the
1727 and
1734 general elections. In February 1741, he voted against the motion for Walpole’s removal. In 1741, Vyner sold the family mansion at Swakeleys to
Benjamin Lethieullier and moved to
Gautby Hall in Lincolnshire,. which was probably designed and built for him by
Matthew Brettingham. Gautby parish church was rebuilt in 1754 as a family chapel of the Vyner family. It is a Grade II*
listed building, red brick, incorporating some medieval work. Vyner was returned unopposed for Lincolnshire again at the
1741 and
1747 general elections. He was described as ‘a whimsical man, full of projects of reformation, especially about the army and militia’. Horace Walpole remarked of him in 1751 that ‘the House generally suffered him to be singular in his opinion’. ==Later life and legacy==