‘Tin Pan Alley’ originally, 1885, referred to the section of New York City where music publishers and songwriters were based. In 1920s London music shops congregated in Denmark Street and the term was applied to this street. Still, in 2015, many of the shops are music-related with guitars in the windows but the street is at risk from regeneration.
2023: Londonist reported on Peter Watts's new book 'Denmark Street: London's Street of Sound'. The regeneration has happened so it's a good time to look back.