After completing
National Service in
Malaya, Seal was briefly assistant organist at
St Bartholomew-the-Great in
Smithfield, London (1960–1961), before serving as assistant organist to
John Birch at
Chichester Cathedral (1961–1968). In 1991 he established a separate girls’ choir in addition to the existing boys'
cathedral choir, the first English cathedral to do so. A controversial move at the time, it led to a transformation in
Anglican choral singing. While at Salisbury, Seal made many recordings and broadcasts with the cathedral choir. He was also conductor and president of the Salisbury Orchestral Society from 1969 to 1994. ==Awards and later life==