Born in Bletchley, Buckinghamshire, Herrick was a boy chorister at St Paul's Cathedral and attended its choir school; aged 11, he sang at the Coronation of Queen Elizabeth II and later that year went with the choir on a three-month forty-concert tour of USA and Canada, which included a private concert in the White House and a brief conversation with President Dwight D. Eisenhower.

[9][10] While at Westminster Abbey, he played at royal and state occasions including Earl Mountbatten’s Ceremonial Funeral,[11] gave over 200 solo recitals on the Abbey organ, and played at both Sir William Walton’s 80th Birthday Concert and his Funeral Service less than a year later.

On the strength of his new exclusive relationship with Hyperion Records and some planned BBC Radio 3 recording tours in Europe as well as healthy bookings for organ concerts, Herrick embarked in 1984 upon a solo career as an international concert organist, staging concerts over the years on a stunning range of organs in the United Kingdom, Australia and New Zealand; United States and Canada; Norway, Sweden, Denmark, Iceland and Finland; France, Switzerland and Germany, The Netherlands, Poland, the Czech Republic, Spain and Italy; South Africa, Hong Kong and Japan.

[22] From the mid-nineties, Herrick made acclaimed recordings on European organs featuring other composers including Louis-Claude Daquin,[23][n 3] Jan Pieterszoon Sweelinck,[24][n 4] Josef Rheinberger,[25] and in 2007, commenced work on a five-year project to record the complete organ works of Dieterich Buxtehude.

[30] Herrick, who had previously conducted the Exonian Singers and Orchestra at Oxford, once again took up the baton in 1974, being appointed Conductor of Twickenham Choral, a position he held for fifty years.

[32] Both choirs were substantial groups of up to 100 fully auditioned members, whom he occasionally combined in performances at Westminster Abbey, Guildford Cathedral and the Royal Albert Hall.