Marlborough was a parliamentary borough centred on the town of Marlborough in Wiltshire, which elected two Members of Parliament (MPs) to the House of Commons from 1295 until 1868, and then one member from 1868 until 1885, when the borough was abolished.
(replaced on inheriting his father's earldom in April 1814)[11] Baring was appointed a Lord Commissioner of the Treasury and Bruce was appointed Vice-Chamberlain of the Household, requiring by-elections.
Brudenell-Bruce was appointed Vice-Chamberlain of the Household, requiring a by-election.
Seat reduced to one member Brudenell-Bruce succeeded to the peerage, becoming Marquess of Ailesbury.
Bruce was appointed Vice-Chamberlain of the Household, requiring a by-election.