This reference from Colvile refers to the Chartist movement which demanded universal male suffrage, ballot voting, annual parliaments and equal representation, and an end to property requirements for members of Parliament. In 1838, with the publication of the People's Charter, this movement had considerable strength among the working class throughout Great Britain. The connection between chartists and abolitionists varied between antagonism and support. On occasion, chartists had disrupted anti-slavery meetings to bring awareness to their issues. Anti-slavery movements were seen to be strongest among the middle class, and chartists voiced the opinion that the abolitionists cared more for the black slave than the working poor in Britain. However, while some antagonism existed, both movements shared a similar philosophy, and both causes shared members. For instance, Joseph Sturge, one of the founders of the British and Foreign Anti-Slavery Society, was also involved with the Chartist movement.
For more information see:
Fladeland, Betty. " Our Cause being One and the Same':
Abolitionists and Chartism." In Slavery and British Society
1776-1846, ed. James Walvin, 69-99. Baton Rouge: Louisiana
State University Press, 1982.