In February 1820 Jenkinson’s half-brother, the prime minister Lord Liverpool, encouraged him to consider standing for Sussex at the impending general election, but he preferred to come in again for East Grinstead on the interest of his cousin Lady Whitworth, widow of the 3rd duke of Dorset. His decision to decline the county was attributed by Lord Sheffield to his ‘peculiar aversion to expenditure’.
He divided against Catholic relief, 6 Mar. 1827. In January 1828 he briefly stepped out of his stricken half-brother’s shadow when he offered to move the address on behalf of the duke of Wellington’s newly formed ministry. This met with a mixed response from the colonial secretary Huskisson, who advised the leader of the House, Robert Peel:
If he runs true the name is a great advantage. Should he bolt the mischief may be very embarrassing ... He must be very carefully tutored, but before you commit yourself, you will, I have no doubt, probe him very carefully in respect to the spirit in which he undertakes the task.
Accordingly, Peel provided Jenkinson with a ‘general notion’ of what should be said, which he duly followed in his speech on 29 Jan., notably in the avoidance of any reference to the previous coalition administrations, other than a personal tribute to Canning.
I had long intended to step forth the champion of my own opinion and the representative of those of my unfortunate brother. I chose myself the occasion and have not to regret or retract a syllable. Indeed, whatever my enemies may say, vanity or interest never have swayed me in politics. I have at least proved now that I was always capable of addressing Parliament and have assigned my reasons for not having done so, and I can say what no one I firmly believe could say before, that my brother was prime minister during 15 years during which time I never asked or received a personal favour and always supported his government.
Add. 38195, f. 209; Dorset RO D/BKL, Bankes’s jnl. 161; Salop RO, Weld-Forester mss 1224/37/219, Jenkinson to Lady Forester, 31 Jan. 1828.
His last recorded votes in the Commons were against repeal of the Test Acts, 28 Feb., and Catholic relief, 12 May 1828.
In December 1828 Jenkinson succeeded to his half-brother’s title and Gloucestershire estates and received personalty worth £46,500.
