Douglas studied music at the University of Bristol and remained there after graduating to complete a PhD thesis focusing on the music of Lennox Berkeley, a pupil of Nadia Boulanger.
He is active as a pianist and accompanist, and has a wide repertory as a solo pianist. He has accompanied many different choirs including Bristol University Singers, the Athenaeum Singers and the Erebus Ensemble.
As a composer Douglas has completed a large variety of works including a Violin Sonata, several song cycles and works for solo piano.
He is also the official organist at All Saints Chapel at Wardour in Wiltshire.