Brunning was born in Essex. He learned guitar and played for a time with the successful band Mungo Jerry. In 1986 he began broadcasting on local radio. He joined Classic FM at around the time it began broadcasting in 1992. He is married with two children.
Brunning's 2006 composition, Pie Jesu, was first recorded by the vocal group All Angels, and has since been recorded by several other artistes including the King's Singers (2010). The Pie Jesu is one of seven movements that together form the oratorio 'Amazing Day' and another piece from this work, his setting of Ave Maria, was recorded by the Welsh soprano Katherine Jenkins (2011). He has also composed several pieces for guitar, and Sahara and Romance No.1 (2010) have been recorded by both XueFei Yang and Craig Ogden. Ogden gave the first performance of 'Concerto Magna Carta' for guitar and small orchestra in 2015, and has since recorded the slow movement from it.
- Amazing Day