Pilkington was returned for Horsham on the interest of his Yorkshire neighbour and friend Viscount Irwin. He was classed by Dupplin in 1754, as a country gentleman supporting Administration. But Pilkington seems to have been little known to the political leaders. Rockingham, who lived near him in Yorkshire, wrote to Newcastle, 29 Oct. 1761: ‘As to Sir Lionel Pilkington, I have so little acquaintance with him that I could not write to him.’
He died 11 Aug. 1778.
