Arthur MacManus was a Scottish trade unionist and communist politician.
Plaque of Arthur MacManus at the Kremlin Wall
The Socialist Labour Party was a socialist political party in the United Kingdom. It was established in 1903 as a splinter from the Social Democratic Federation by James Connolly, Neil Maclean and SDF
The British SLP adopted the familiar "arm and hammer" of its American namesake as its official logo.
Radical Irish labour leader James Connolly was an important figure in the formation of the British SLP.
The SLP was inspired by the Bolshevik Revolution and lost a group of its members to the new Communist Party of Great Britain in 1920.