William Allen (National Liberal politician)

William Allen (1870-1947) was a British politician who served as a Member of Parliament (MP) for the constituency of Poplar South from 1922 to 1929. He was a member of the National Liberal Party, a faction that emerged from the Liberal Party following the split caused by David Lloyd George's leadership during and after World War I.

Allen's political career was largely focused on representing the working-class interests of Poplar, a district in East London. He was involved in local government prior to his election to Parliament and was known for his advocacy on issues such as housing, poverty, and unemployment. During his time in the House of Commons, he supported legislation aimed at improving social welfare and addressing the economic hardship faced by many in his constituency.

The National Liberal Party, of which Allen was a member, gradually declined in influence after the 1920s, eventually merging back into the mainstream Liberal Party. While Allen did not seek re-election after 1929, his contribution to representing the Poplar South constituency and his commitment to social reform are noteworthy. Little information beyond his parliamentary service and party affiliation is readily available in readily accessible public records. He is not to be confused with other historical figures named William Allen.