Maynard stood for Essex in 1754 but declined the poll. On the vacancy in 1759, a meeting of Essex Whigs offered Maynard ‘their support and assistance if he stood upon that interest’; he thanked them for the honour, ‘but he could do nothing without consulting [his distant cousin] Lord Maynard thereupon’.
In Bute’s list of December 1761 Maynard is marked ‘Newcastle’, subsequently changed to ‘Bute’. Fox, writing to Bute, 30 Nov. 1762, named Maynard among those from whom the seconder of the Address might be chosen;
On 4 Nov. 1767 Maynard, a Government supporter, and John Luther, who sided with the Opposition, were nominated to stand for Essex on a joint interest at the next general election. The ‘Old Interest’, reinforced by Rigby, after considerable squabbles and difficulties, put up against them Eliab Harvey (who had voted with the Government even on the land tax) and Jacob Houblon jun. Maynard, a sick man,
