After the collapse of Lord Derby's minority government, the Whigs and Peelites formed a coalition under the Peelite leader Lord Aberdeen. The government resigned in early 1855 after a large parliamentary majority voted for a select committee to enquire into the incompetent management of the Crimean War. The former Home Secretary, Lord Palmerston, then formed his first government.

Edward George Geoffrey Smith-Stanley, 14th Earl of Derby,, known as Lord Stanley from 1834 to 1851, was a British statesman and Conservative politician who served three times as Prime Minister of the United Kingdom. To date, he is the longest-serving leader of the Conservative Party. He is one of only four British prime ministers to have three or more separate periods in office. However, his ministries each lasted less than two years and totalled three years and 280 days. Derby introduced the state education system in Ireland, and reformed Parliament.