Previously at Chichester, Musical Supervisor/Musical Director/Arrangements for Me and My Girl, Musical Director for Guys and Dolls (and Savoy Theatre/UK tour), The Pajama Game (and Shaftesbury Theatre), Oh, Kay! and My One and Only; Musical Supervisor for The Sound of Music, Kiss Me, Kate (and Old Vic).

Gareth Valentine began his career in 1981 working alongside composers such as Stephen Sondheim (Sweeney Todd, Into The Woods), Stephen Schwartz (Wicked, Pippin), John Kander (Cabaret, Chicago, Kiss of the Spiderwoman), Andrew Lloyd Webber (Love Never Dies, Cats, Aspects of Love) and Maury Yeston (Nine, Titanic).

He has conducted the following West End musicals, all of which won Olivier Awards: 42nd Street (Drury Lane), Kiss Me, Kate (Victoria Palace), Merrily We Roll Along, Company and City of Angels (Donmar), Chicago (Adelphi). He recently conducted My Fair Lady (London Coliseum) and was UK Music Supervisor of its subsequent UK tour.

Orchestras include: BBC Symphony Orchestra, BBC Concert Orchestra, Orchestre de Chambre de Paris, , Welsh National Opera Orchestra, Royal Philharmonic Concert Orchestra, Rome Opera House Orchestra and National Symphony Orchestra.

He has conducted for many international artistes including: Barbara Cook, Eartha Kitt, Elaine Paige, Liza Minelli, Judi Dench, Bryn Terfel, Chita Rivera, Jerry Lewis, Elton John, Roger Moore, Ian McKellen, Clarke Peters, Victoria Wood, Joel Grey and Wayne Sleep. He was also music supervisor for Channel 4’s Musicality.

Gareth’s Requiem has been performed at Southwark Cathedral, in Warwick, Boulder, Colorado, Helsinki and Paris and was recorded at Abbey Road Studios; he wrote a new score for Aladdin with Ian McKellen (Old Vic). He composed the ballet Strictly Gershwin for English National Ballet.