The constituency consisted of the market town of Boroughbridge in the parish of Aldborough (which was also a borough with two MPs of its own). By 1831 it contained only 154 houses, and had a population of 947.
Boroughbridge was a burgage borough, meaning that the right to vote was vested in the tenants of certain specified properties, of which there seem to have been about 65 by the time the borough was abolished. Since these properties could be freely bought and sold, the effective power of election rested with whoever owned the majority of the burgages (who, if necessary, could simply assign the tenancies to reliable placemen shortly before an election). For more than a century before the Reform Act, Boroughbridge was owned by the Dukes of Newcastle, who controlled around fifteen seats across the country; however, in the 1790s, they sold one of the seats for £4,000 to the banker Thomas Coutts, who used it to put his son-in-law, Francis Burdett, into Parliament.
Source: The Parliaments of England by Henry Stooks Smith (1st edition published in three volumes 1844–50), second edition edited (in one volume) by F.W.S. Craig (Political Reference Publications 1973)
^Spooner and Lawson were initially declared re-elected at the 1820 general election, but they were unseated and Mundy and Dawkins were returned on petition
^ abCasey, Martin. "Boroughbridge". The History of Parliament. Retrieved 25 May 2020.
References
Robert Beatson, "A Chronological Register of Both Houses of Parliament" (London: Longman, Hurst, Res & Orme, 1807) [1]
Michael Brock, The Great Reform Act (London: Hutchinson, 1973)
D. Brunton & D. H. Pennington, Members of the Long Parliament (London: George Allen & Unwin, 1954)
Cobbett's Parliamentary history of England, from the Norman Conquest in 1066 to the year 1803 (London: Thomas Hansard, 1808) [2]
J E Neale, The Elizabethan House of Commons (London: Jonathan Cape, 1949)
J Holladay Philbin, "Parliamentary Representation 1832 – England and Wales" (New Haven: Yale University Press, 1965)
Henry Stooks Smith, "The Parliaments of England from 1715 to 1847" (2nd edition, edited by FWS Craig – Chichester: Parliamentary Reference Publications, 1973)
Frederic A Youngs, jr, "Guide to the Local Administrative Units of England, Vol II" (London: Royal Historical Society, 1991)