Pink Floyd's drummer Nick Mason on lost track

A long-lost recording of virtuoso jazz violinist Stephane Grappelli jamming with rock superstars Pink Floyd is finally set for release.

The master tape was presumed to have been wiped but it was buried deep in the EMI vaults for 36 years.

Drummer Nick Mason told Radio 4's Front Row that the track is the "jewel in the crown" of the band's archives.