Sir Joseph Wilson Swan 1828-1914 Inventor of the incandescent lamp Sir James Dewar 1842-1923 Inventor of the vacuum flask, and Professor Sir Ambrose Fleming 1849-1945 Inventor of the diode valve, were all connected with this site. Here began the post industrial revolution - the technological revolution.

This plaque is mentioned in http://www.walklondon.org.uk/uploads/File/leaflets/lvws2directions_15062010214941.pdf