Commemoration stone

Bloody pigeon netting!
Commemorative plaque over Melton St entrance to former National Amalgamated Approved Society building. Dated 1906 indicating that the Euston Rd section is a later extension.
In fact, since the NAAS wasn't formed until 1912 this can't originally have been their building at all. Now I'm finding myself becoming fascinated by the history of a building that I don't even really like...