Henry Hetherington was an English printer, bookseller, publisher and newspaper proprietor who campaigned for social justice, a free press, universal suffrage and religious freethought. Together with his close associates, William Lovett, John Cleave and James Watson, he was a leading member of numerous co-operative and radical groups, including the Owenite British Association for the Promotion of Co-operative Knowledge, the National Union of the Working Classes and the London Working Men's Association. As proprietor of The Poor Man's Guardian he played a major role in the "War of the Unstamped" and was imprisoned three times for refusing to pay newspaper stamp duty. He was a leader of the "moral force" wing of the Chartist movement and a supporter of pro-democracy movements in other countries. His name is included on the Reformers' Memorial in Kensal Green Cemetery.

William Lovett was a British activist and leader of the Chartist political movement. He was one of the leading London-based artisan radicals of his generation.