 When the Liberals returned to power in 1880 under Gladstone, Grosvenor was made Patronage Secretary to the Treasury, as the Chief Whip was known.He remained in this post until 1885, but disagreed with Gladstone over Irish Home Rule and resigned his seat in protest (by accepting appointment as a Steward of the Chiltern Hundreds) in 1886.He was subsequently raised to the peerage on 22 March 1886 as Baron Stalbridge, of Stalbridge in the County of Dorset, and became a leader of the Liberal Unionist Party from the House of Lords.