Patrick Campbell-Lyons (born 13 July 1943, Lismore, County Waterford, Ireland), is a composer and musician who is one half of the cult symphonic-rock band, Nirvana - formed in London in 1967 and still sporadically active in 2006.

Campbell-Lyons was part of the West London music scene from the early 1960s playing in several bands. He was the vocalist and a founder member of a locally-popular R&B band Second Thoughts whose lineups included future record producer Chris Thomas, Thunderclap Newman founder/drummer Speedy Keen and two future members of prog-rock band Jade Warrior (Jon Field and Tony Duhig). Second Thoughts split up in late 1965 and after a year living in Sweden, Campbell-Lyons returned to London in late 1966.

In early 1967 he formed Nirvana with Greek musician Alex Spyropolous. The duo (augmented in the studio and live by a floating line-up of session musicians) created a series of critically-acclaimed baroque, orchestrated albums before disbanding in the early 1970s.

Campbell-Lyons then pursued a career in the music business as an A&R executive and producer - while continuing to occasionally record solo albums including Me & My Friend, The Electric Plough and The Hero I Might Have Been.

Campbell-Lyons' first solo album Me & My Friend was reissued on CD in 2001 in the UK by Market Square Records together with bonus tracks from one of Nirvana's later albums Songs Of Love And Praise.