Archive newsreel of the Seige is available to view online from British Pathe:
Battle of London - Sidney Street Siege
Siege - Police and Soldiers firing from Alleyways and Windows
City of London Police 'Wanted' poster, 30th January 1911
Peter Piatkow(Peter the Painter) became a key suspect following the Houndsditch robbery and murder. Believed by many to be in 100 Sidney Street during the siege, Piatkow was not one of the 2 bodies recovered following the fire that ended it.
Peter the Painter
Film Poster 'The Siege of Sidney Street', Jimmy Sangster, 1960
Great Crimes And Trials - The Siege of Sidney Street
Short documentary on the Siege of Sidney Street that includes some rare pictures of East London from the period. Unfortunately it also has quite a few mistakes in it (e.g. they talk about 'Charles Svars' instead of Fritz Svars), but it's interesting all the same:
Great Crimes And Trials - The Siege of Sidney Street pt 1 of 3
Great Crimes And Trials - The Siege of Sidney Street pt 2 of 3
Great Crimes And Trials - The Siege of Sidney Street pt 3 of 3
Armed officers during the siege
The Black Museum- The Tottenham Outrage, 1909
Short excerpt from a series of crime documentaries broadcast in 1988. This episode deals with the Tottenham Outrage, a dramatic armed robbery carried out by two Latvian anarchists in 1909:
The Black Museum: The Tottenham Outrage