Plaque

This building was the Decca recording studios 1937 - 80.

As an aside, the Railway Hotel (now the Railway) practically next door, on the corner with West End Lane, 1961-70,  hosted Klooks Kleek, one of swinging London's legendary music clubs.  Begun as a jazz club but ran a regular Tuesday R'n'B night. "Over a decade, it hosted gigs by Rod Stewart, a 15-year-old Stevie Wonder, Georgie Fame, John Lee Hooker, Led Zeppelin, Elton John (playing as Reg Dwight) and Deep Purple, among others." Including Cream. 

John Mayall Bluesbreakers "played there 33 times and recorded The Bluesbreakers' debut album 'John Mayall Plays John Mayall - Live At Klooks Kleek' in 1964. The pub was next door to the Decca recording studios and Mayall was among several performers who ran cables out of the back window, over the roofs and into the studio to capture their live performance."

In 1993 John Mayall revisited the Railway and was photographed with a plaque, which presumably was erected inside the pub.

Much more information and photos from our source: This Is Local London.