First gig Sex Pistols November 6th 1975 'Unplugged'

Simon Harriyott on Flickr
This is an approximate position

Plaque is now missing

Central St Martin's College, 107-111 Charing Cross Road, London
[geolocate this address]
Google Streetview

by St Martin's School of Art on 03 November 2005

Colour: blue

Wikimedia:

Flickr:

See also...
Eifion on Flickr
Mark Hobbs on Geograph