Pink Floyd - London '66–'67 (1995)

London '66–'67 is an EP and film of Pink Floyd music, containing two "lost" tracks—an extended version of "Interstellar Overdrive" and a previously unreleased track "Nick's Boogie".
These tracks were originally recorded for Peter Lorrimer Whitehead's film Tonite Lets All Make Love in London in 1967, and the former appeared in edited form on the soundtrack album.
Originally released in full on the 1990 See for Miles Records UK reissue of the soundtrack album, they were the earliest Pink Floyd recordings available commercially