Lunn was a supporter of the Labour Party, and served on Rothwell Urban District Council and the Hunslet Board of Guardians. He stood unsuccessfully in the 1912 Holmfirth by-election. He was elected at the 1918 general election as Member of Parliament (MP) for the newly created Rothwell constituency, and held the seat until he died in office in 1942, aged 69.
When the Second Labour Government took office in June 1929, Lunn was appointed as Under-Secretary of State for the Colonies. He was moved in December that year to the post of Under-Secretary of State for Dominion Affairs, and held that position until the formation of the National Government in August 1931.
In July 1936, during a debate on the Government's Midwives Bill, Lunn referred to the death of his daughter-in-law, earlier that day, when arguing for more to be done to protect the health of mothers.
|Parliament of the United Kingdom|
|New constituency|| Member of Parliament for Rothwell
Thomas Judson Brooks
| Secretary for Overseas Trade
| Under-Secretary of State for the Colonies
| Under-Secretary of State for Dominion Affairs
|This article about a Labour Member of the Parliament of the United Kingdom (MP) representing an English constituency is a stub. You can help Wikipedia by expanding it.|