Leycester, a lawyer with ‘the reputation of being a man of business, as well as a man of talents’ was returned for Milborne Port in conjunction with Lord Paget, the patron’s son, in 1802. This was soon after his appointment as a Welsh judge, which, according to Lord Eldon, was much to his satisfaction.
Leycester opposed the Grenville administration, voting against them on the repeal of Pitt’s Additional Force Act, 30 Apr. 1806, and on the American intercourse bill, 17 June, though his only contributions to debate that year were to ‘put the House right’ on a legal point, 21 Mar., and a brush with Whitbread over Melville’s case in retrospect, 11 July. He was listed adverse to the abolition of the slave trade. He subsequently gave a general support to administration; he was a friend of Perceval and the Whigs listed him as being ‘against the Opposition’ in 1810. He persuaded the solicitor-general not to resist Romilly’s criminal law amendment bill, 18 May 1808. In November 1807 the Duke of Portland had suggested he should become judge advocate-general, but discovered that Leycester was better off as a Welsh judge.
A member of the finance committee from 30 June 1807, when he was chosen after a division, until he lost his place by vote of the House to an opposition man, 31 Jan. 1810, he defended its amended report against its chairman Henry Bankes when the latter alleged, 29 June 1808, that he could not agree with all of it: he was regarded as ‘a tower of strength’ by the ministerialists.
The sudden death of Perceval was ‘a great grief’ to him. He voted against the reconstruction of the ministry, 21 May 1812, and against Catholic relief, 22 June. He presented the report of the committee on disturbances in the north of England, 8 July. He retired from Parliament at the dissolution, and from legal office in 1823. As early as 1811 he was afflicted with deafness, according to Lord Glenbervie, who also described him as ‘a man of very gentle and very engaging manners and conversation’.
