| Constituency | Dates |
|---|---|
| Monmouthshire | 20 May 1816 – 1832 |
| Monmouth Boroughsshire | 1832 – 23 Feb. 1848 |
Ld. of Treasury Mar. 1819 – Apr. 1827, Jan. 1828 – Nov. 1830; PC 20 Dec. 1834; commr. of woods, forests and land revenues Dec. 1834 – May 1835; chancellor of duchy of Lancaster Sept. 1841-July 1846.
Lord Granville Somerset succeeded his late uncle Lord Arthur to the family seat for Monmouthshire unopposed in 1816 and held it until his death.1R. D. Rees, ‘Parl. Rep. S. Wales 1790-1830’ (Reading Univ. Ph.D. thesis, 1962), ii. 504; DNB.
