Pitt–Tierney duel
William Pitt the Younger, the prime minister since 1783.
George Tierney, a prominent member of the Whig opposition.
The Pitt–Tierney Duel took place on 27 May 1798 when the Prime Minister of Great Britain William Pitt the Younger met his political opponent George Tierney in a duel with pistols on Putney Heath outside London.