The Lord Lonsdale Challenge Belt, commonly known as the Lonsdale Belt, is the oldest championship belt in British professional boxing. The 5th Earl of Lonsdale introduced the prize on behalf of the National Sporting Club (NSC), intending it to be awarded to British boxing champions. Arthur Frederick Bettinson, manager of the NSC, introduced terms and conditions regarding the holding of the belt, which ensured its lasting prestige. Freddie Welsh earned the first Lonsdale Belt in 1909 after winning the NSC British Lightweight title.

Freddie Welsh (born Frederick Hall Thomas; 5 March 1886 – 29 July 1927) was a Welsh World boxing champion. The lightweight boxer was born in Pontypridd, Wales, nicknamed the "Welsh Wizard". Brought up in a tough mining community, Welsh left a working-class background to make a name for himself in America. He turned professional as a boxer in Philadelphia in 1905, and spent the best part of his career fighting in the United States.

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