William Ewart Gladstone

29 December 1809-19 May 1898. Prime Minister four times. Beside other things, he introduced secret voting (Ballot Act 1872) and supported the Irish Home Rule Movement. After failing to introduce Home Rule due to a lack of support by the House of Lords, he resigned in 1894. Gladstone died from cancer in 1898.

Sources

http://www.number10.gov.uk/history-and-tour/prime-ministers-in-history/william-ewart-gladstone