Colwell started singing as a chorister at St Paul’s Cathedral Choir School in London, performing on tours throughout France, Spain and Japan. He has been a soloist on numerous recordings and sang the title theme to the Channel 4 drama The Big Battalions.
He studied at Junior Royal Academy in London and the Royal Northern College of Music, in Manchester. During his time in Manchester, he performed in Verdi’s Falstaf and Tchaikovsky’s The Queen of Spades.
He has added a number of new roles to his repertory in the last season, including Escamillo in Bizet's Carmen at Opera’r Ddraig, Capulet in Gounod's Romeo and Juliet at Riverside Opera, Marcello in Puccini's La Boheme with Opera up Close at the Ravenna International Festival, and Dr Bartolo in Rossini's Barber of Seville at the Edinburgh Fringe Festival.
In August, he will be singing the role of the Inn Keeper in the premiere of Louis Mander's Oh whistle and I will come to you my lad, a ghost story opera set in Sussex. This will be performed as part of the Tete-a-Tete opera festival.
Colwell is also the co-founder and artistic director of Island Opera, a classical vocal ensemble providing entertainment across South Wales and the U.K.