On his release, Knox took refuge in England. The Reformation in England was a less radical movement than its Continental counterparts, but there was a definite breach with Rome. The Archbishop of Canterbury, Thomas Cranmer, and the regent of King Edward VI, the Duke of Somerset, were decidedly Protestant-minded. However, much work remained to bring reformed ideas to the clergy and to the people. On 7 April 1549, Knox was licensed to work in the Church of England. His first commission was in Berwick-upon-Tweed. He was obliged to use the recently released "Book of Common Prayer", which maintained the structure of the Sarum Rite while adapting the content to the doctrine of the reformed Church of England. Knox, however, modified its use to accord with the doctrinal emphases of the Continental reformers. In the pulpit he preached Protestant doctrines with great effect as his congregation grew.