Illusion were formed in 1977 as an offshoot of the British band Renaissance, intended to bring together the original members of the famous prog band whose 1971 album was titled Illusion.
The idea derailed when vocalist and guitarist Keith Relf passed away.
The remaining members, however, persevered and released two albums before disbanding in 1979.
Tracks from both albums are performed in this BBC radio 1 session.
