The Vincent family had owned estates in Surrey since the early seventeenth century. Vincent’s grandfather and great-great-grandfather both represented the county, and in 1761 he himself was returned for it unopposed. In Bute’s list of December 1761 he was counted as a Government supporter, but he voted against the peace preliminaries in both divisions; was classed by Jenkinson in the autumn of 1763 as ‘doubtful’; voted against the Grenville Administration over Wilkes and general warrants; and on 10 May 1764 was included by Newcastle among his ‘sure friends’. In Newcastle’s ‘plan for a new Administration’, dated 30 June 1765, Vincent was put down for the Board of Green Cloth, and similarly in the plans of 2, 5 and 9 July.
At the general election of 1768 Vincent was again returned unopposed for Surrey. Throughout this Parliament he constantly voted with Opposition. Only three speeches of his are reported—none on a major issue. In 1774 Vincent contested Surrey and headed the poll with a large majority. His vote with the Opposition on Wilkes, 22 Feb. 1775, was his last before his death on 22 May 1775.
