Beginning his career as a decorator, Wallhead joined the Independent Labour Party (ILP) and later became a journalist and lecturer. A committed opponent of World War I, he was detained in 1917 under the Defence of the Realm Act.
Wallhead unsuccessfully contested Coventry in the 1918 general election for the Labour Party, to which the ILP was affiliated. He was elected to Manchester City Council in 1919, a position he held for three years.
At the 1922 general election, Wallhead gained Merthyr from the Liberals. As the politics of the South Wales coalfield radicalised, this turned into a safe Labour seat, which he was to hold until his death. He was one of only five ILP MPs to retain their seats in the 1931 general election, after Labour withdrew their support, and initially supported their disaffiliation from Labour. However, in September 1933 he resigned from the ILP and rejoined Labour. He died the following year.
- Michael Stenton and Stephen Lees, Who's Who of British MPs: Volume III, 1919-1945
|Parliament of the United Kingdom|
| Member of Parliament for Merthyr
S. O. Davies
|Party political offices|
C. T. Douthwaite
| Lancashire Division representative on the Independent Labour Party National Administrative Council
| Chairman of the Independent Labour Party