[1] In the case of Cardiff, the relevant "contributory boroughs" were Llantrisant and Cowbridge, and until 1832 also Swansea, Loughor, Neath, Aberavon, and Kenfig.[2] Elections were often held at Bridgend, which was not a contributory borough but was conveniently central in Glamorgan.As proposed in 1830, the reform bill would have added Llandaff, Aberdare, and Merthyr Tydfil as Cardiff contributory boroughs, but in the event Merthyr and Aberdare became a separate borough while Llandaff remained part of Glamorgan county constituency, which gained a second seat.Nicholl was appointed Judge Advocate General of the Armed Forces, requiring a by-election.Reed was appointed a Lord Commissioner of the Treasury, requiring a by-election.