[2] Carteret was returned to Parliament for Weobly in May 1796, a seat he held until December the same year,[3] and then represented Bath between 1796 and 1832.
[4] He served as Vice-Chamberlain of the Household from 1804 to 1812 and was sworn into the Privy Council in 1804.
[5] In 1838 he succeeded his childless elder brother George in the barony and took his seat in the House of Lords.
He died at his house Hawnes Park in March 1849, aged 76.
On his death the barony became extinct, while the estate passed to his nephew the Rev.