The British Ballet Organisation founded by Louise Kay and Edouard Espinosa in 1930

http://openplaques.org/plaques/10016 is also at this site

This is an approximate position

Woolborough House, 39 Lonsdale Road, SW13, London
[geolocate this address]
Google Streetview

by British Ballet Organisation

Colour: blue

Wikimedia:

Flickr: