Henry "Harry" Quelch (1858–1913), known exclusively by his nickname "Harry," was one of the first Marxists in Great Britain.
Henry Martin (c. 1864–1951), also known as Harry Martin, was a British socialist.
A member of parliament (MP) is the representative of the voters to a parliament.
Reformism is the belief that gradual changes through and within existing institutions can ultimately change a society's fundamental economic system and political structures.
The Socialist Party of Great Britain (SPGB) is a socialist political party in the United Kingdom.
Socialist Standard is a monthly socialist magazine published without interruption since September 1904 by the Socialist Party of Great Britain.
Socialist Studies is the name of a quarterly Marxist periodical and of the group which publishes it.