In 1806 Egerton inherited large Cheshire estates which made him one of the richest commoners in the kingdom. The old Tatton property at Wythenshawe went to his younger brother Thomas William, who resumed the surname of Tatton. He stood for Cheshire, which his father had represented in the 1802 Parliament, at the general election of 1812, was returned unopposed and sat undisturbed for five Parliaments.
Lord Sidmouth, the Home secretary, was informed that Egerton was friendly to ministers,
Egerton, a steadfast opponent of Catholic relief, was not a totally docile ministerialist. He voted against government on the ducal grants, 28 June and 3 July 1815, 15 Apr. 1818, the leather tax, 9 May, Thompson’s re-election, 12 June 1816, and the salt duties, 25 Apr. 1817 and 29 Apr. 1819. He welcomed the government’s concession of an inquiry into these duties, 10 Mar. 1818, and again called for their reduction, 18 Mar. 1819.
His uncle Edward Bootle Wilbraham thought he could not be counted on to defend the conduct of the Peterloo magistrates, of whom his brother was one, as he was ‘quite unused to public speaking’; but in the debate on the address, 24 Nov. 1819, Egerton spoke in their defence, to the gratification of his uncle, who thought he did it ‘very well’.
