Increasingly radical, he supported two drivers who refused to move Irish freight during the 1913 Dublin lock-out, organising solidarity action which ultimately led to most of the South Wales railway workers going on strike.
[3] ASLEF set up a GWR Delegation Board in 1915, and Squance was chosen as its first secretary; he was elected to the union's executive the following year, then served as vice-president in 1919/20 and president in 1920/21.
[2] Squance was a member of the Labour Party, and was selected as the Prospective Parliamentary Candidate (PPC) for Bassetlaw at the 1935 UK general election.
[6] During the early 1930s, ASLEF's general secretary, John Bromley, suffered from increasingly poor health, and Squance frequently deputised for him.
[5] As general secretary, Squance was known as an outspoken anti-fascist, close to the Communist Party of Great Britain.