Anthony James Keith "Tony" Hymas (born 23 September 1943) is an English keyboard player, pianist, and composer.
As company pianist for the Ballet Rambert in its resurgent 'modern' form, Hymas wrote a substitute score for Glen Tetley's Rag Dances over the course of eight days.
In 1974 he co-composed the theme song with Joe Campbell to the UK television series Mr Men, based on the children's books by Roger Hargreaves.
The band had a Top 10 hit in the UK with the song "I Won't Let You Down" in 1982, but disbanded a year later after poor sales of their subsequent singles and Diamond's decision to return to his solo career.
Hymas composed and sang on the track "Desperate for Your Love", the opening song on the 1985 album, The Great Balloon Race, by progressive rock band Sky.