After Guy graduated from the Royal Northern college of Music (GRNCM) and Manchester University (Bmus) his career took a parallel course in both performance and composition. As a concert pianist, apart from appearing regularly with his parents (Isabel Beyer and Harvey Dagul), with whom he made many recordings and TV appearances, Guy was a busy soloist, accompanist and chamber musician. He has played in most of the leading concert halls - Wigmore Hall, Albert Hall, Queen Elizabeth Hall, Royal Festival Hall etc - was a member of the Decchler Piano Trio and accompanist to the London Elizabethan Singers.

Guy's sight-reading skills got him plenty of work as a session pianist working on numerous projects with George Fenton and Trevor Jones. Having created a piano album of George's work, and performed his music on stage (with Alan Bates, Zoe Wannamaker, Tim Piggot-Smith, Robert Hardy, Jennifer Ehle and others) in theatrical productions, Guy became orchestrator for Trevor and worked in his studios in London and Hollywood on many projects in all sorts of roles including co-composer on such films as "Mississippi Burning", "Sea of Love", "Arachnophobia", "The Last of the Mohicans", "Cliffhanger" and "In the Name of the Father".

In 1995 Guy set up his own studio in Oxfordshire and there he composes music for TV and radio. Recent film work includes scoring "Greenfingers" with Helen Mirren, Natasha Little and Clive Owen, "Happy Birthday" produced and directed by Helen Mirren and starring John Goodman and a South Bank Special Feature, "Broken Morning".

Apart from his work in film and television, Guy has formed many collaborations with song writers and other musicians, working in the 'classical crossover' genre, opera, symphonic and in the ambient acid jazz world.

Away from his studio, Guy cogitates in his fragrant Oxfordshire garden and occasionally plays keyboard for the best rock covers band there has ever been - Lucky To Be Alive! He is also an expert on giving his three teenage children (Rose, Sam and Bill) a really, really hard time. (One day, they'll thank him for all the advice given).

Someone once referred to him as "pure genius"..............but he thinks that might have been his (then) oh so slightly senile grandmother a very, very long time ago. And it probably wasn't about his music making!