William Henry Mainwaring was a Welsh coal miner, lecturer and trade unionist, who became a long-serving Labour Party Member of Parliament. Both as a trade unionist and a politician he struggled, largely successfully to counter Communist influence. He was said to have spoken "with passion and fire on behalf of his fellow miners".
- Occupation
- trade unionist, politician, coal miner
- Position held
- member of the 41st Parliament of the United Kingdom, member of the 40th Parliament of the United Kingdom, member of the 39th Parliament of the United Kingdom, member of the 38th Parliament of the United Kingdom
