[1] He held office under the Earl of Derby as Paymaster General and Vice-President of the Board of Trade in 1859 and under Benjamin Disraeli as Lord Privy Seal between 1878 and 1880.

[1] From his father's succession as second Earl of Beverley in 1830, Percy was styled Lord Lovaine.

James Stuart-Wortley-Mackenzie, second son of Prime Minister John Stuart, 3rd Earl of Bute.

The Duke and his wife were buried in the Percy family vault in Westminster Abbey.

At the Percy seat Alnwick Castle, Northumberland, he enlisted Anthony Salvin to do considerable interior works in the neo-Gothic style, and purchased the collection of paintings amassed by the Roman painter Vincenzo Camuccini, to add to the pictures at Alnwick, swelled by the collection formerly at Northumberland House, The Strand, London, which was demolished in 1874.