Duncombe, nephew of the Yorkshire county Member, bought his way into Parliament and found no other way to stay there. He was a ministerial candidate abetted by Sir John Call at Shaftesbury in 1790 and succeeded after a contest. In 1796, on his uncle’s retirement, he offered for Yorkshire, but found at the nomination that others stood a better chance, and withdrew, giving his interest to Lascelles.
Duncombe unsuccessfully contested Hedon in 1807. He appeared on the Duke of Portland’s list of applicants for peerages soon afterwards.
At the election of 1818 Duncombe, whose pretensions were favoured by some Yorkshire ministerialists, was a guest on the Holmes interest in the Isle of Wight. An opening offered him by Charles Tennyson at Grimsby, evidently intended for his eldest son, was declined by him and he applied to Lord Liverpool for another for him. He was disappointed, ‘after I had supported for eight and twenty years that system of politics which had uniformly actuated your lordship’, that the prime minister could not satisfy this wish.
