After a gap year as Organ Scholar of Worcester Cathedral, he studied at the Royal Academy of Music with Nicolas Kynaston, James O'Donnell and Patrick Russill, whilst also working as Organ Scholar of Southwark Cathedral and Westminster Abbey.
Upon graduating with first-class honours, he was appointed Assistant Organist of Westminster Abbey.
[2] During his time in St Davids, Cook was also Music Director of the Dyfed Choir.
[6] He accompanied the Abbey Choir on a CD release of music by Hubert Parry on Hyperion, which includes his own arrangement of Blest Pair of Sirens.
[7] In 2017 he took up the office of Master of the Choristers and Organist at Durham Cathedral in Autumn 2017, succeeding James Lancelot who had held the position for 32 years.