William Whitehead also maintains a complementary career as a conductor. He was Director of Music at St Mary's Church, Bourne Street, London, from 2000 until 2009, directing the eight-voice professional choir (www.stmarythevirgin.org.uk). This renowned Anglo-Catholic church has a wide-ranging music programme, in which Mozart Masses are to be heard with a small ensemble and occasionally a full orchestra. William made the first ever recording on the Lewis/Willis organ in 2007 (Edwardian Splendour, music by Bairstow, Parry, Elgar and others), available by contacting the church office (email@example.com or 020 7730 2423) or by contacting Herald Records (www.heraldav.co.uk)
A CD of the choir was recorded in 2002- O Magnum misterium, recreating a typical Midnight Mass at St Mary's, complete with plainsong propers in English and Mozart’s Missa Solemnis in C, K337, with orchestra. This is also available through the church office.
William also undertakes chorus-mastering from time to time. He has worked with the London Symphony Chorus, the Academy of St Martin in the Fields and others, with conductors such as Paul Daniel, Jaap van Zweden and Richard Hickox.