Who is the first and only boxer, at any weight division, to have won three Lonsdale Belts outright?

Henry Cooper (heavyweight) is the only man ever to win three Lonsdale belts outright. Sir Henry Cooper (3 May 1934 – 1 May 2011) was an English heavyweight boxer. Cooper held the British, Commonwealth, and European heavyweight titles several times throughout his career, and unsuccessfully challenged Muhammad Ali for the world heavyweight championship in 1966.

The Lonsdale Belt is a boxing prize introduced by Hugh Lowther, 5th Earl of Lonsdale, to be awarded to British boxing champions. It is still awarded to British champions today.

Lord Lonsdale organised boxing matches and was the first president of the National Sporting Club. In 1909, he introduced the Lonsdale Belt as a new trophy for the British champion at each weight division. The belts were crafted from porcelain and twenty-two carat gold, supported by red, white and blue fabric backing, and were only to be held by a fighter as long as he was British champion. However, a British champion was allowed to keep his Lonsdale Belt if he defended his title successfully twice. Later belts were made from nine carat gold rather than the original twenty-two carat. A total of 22 Lonsdale belts were issued by the National Sporting Club, and of these 20 were won outright.