Simmonds has released three solo albums,
The Shape of Rain (1996),
The Seven Colours of Emptiness (2007) and
Mickey Simmonds III (2021) which he describes as "a small homage to the late great Keith Emerson, sadly missed by me". He has also released
Variations on Melodies of Mike Oldfield (2000),
Lord of the Rings – The Two Towers (music inspired by) (2002),
Lord of the Rings – Return of the King (music inspired by) (2004) and
Bach for Dinner (unknown date) Simmonds played on two albums:
Islands (1987), and ''
Heaven's Open (1991); one compilation: The Complete Mike Oldfield'' (1985), and toured with Mike 1983 -1993. Having at one time been considered as a replacement for Mark Kelly in
Marillion by the band's then-singer Fish, Simmonds was later chosen as the dominant co-writer on Fish's 1990 solo debut
Vigil in a Wilderness of Mirrors. He also co-wrote all tracks on the follow-up album
Internal Exile and performed on the tours promoting these albums. Fish described him as the
musical director of his early solo years. He left in 1992, but later returned for the tour promoting
Sunsets on Empire (1997) and co-wrote two and performed on three tracks on
Raingods with Zippos (1999). Simmonds had a long-standing relationship with
Neil Innes, hence
The Rutles (including all the arrangements on Archaeology 1996) and
The Bonzo Dog Doo-Dah Band, whose studio album ''
Pour l'Amour des Chiens'' was co-produced by Simmonds & Innes. Simmonds toured with
Camel during the tour following the
Dust and Dreams album release in 1992 (which had featured
Ton Scherpenzeel on keyboards), performances of which appeared on the Camel live album
Never Let Go (1993); he also played on the subsequent studio album
Harbour of Tears (1996). Simmonds appeared on
Tuscany (2001) and the live album
In the Land of the Rising Sun: Live in Japan 2002. Simmonds worked with the
French band from
Bordeaux XII Alfonso on
The Lost Frontier (1996),
Odyssées (1999),
Claude Monet vol.2 1889–1904 (2005),
Charles Darwin (Fall 2011). ==Personal life==