Headquarters of the Social Democratic Federation 1926-1937 founded by Henry Hyndman in 1884

Photo of Henry Hyndman and Social Democratic Federation green plaque
Christian Lüts on Flickr
Photo of Henry Hyndman and Social Democratic Federation green plaque
Simon Harriyott on Flickr
Photo of Henry Hyndman and Social Democratic Federation green plaque
Spudgun67 on Wikimedia Commons
Photo of Henry Hyndman and Social Democratic Federation green plaque
Alan S> on Flickr
Photo of Henry Hyndman and Social Democratic Federation green plaque
Simon Harriyott on Flickr
Photo of Henry Hyndman and Social Democratic Federation green plaque
Spudgun67 on Wikimedia Commons
See also...
Photo of Henry Hyndman blue plaque
Spudgun67 on Flickr