In England, the monarch's letters to his subjects are known to have been carried by relays of couriers as long ago as the 15th century. The earliest mention of
Master of the Posts is in the ''King's Book of Payments
where a payment of £100 was authorised for Brian Tuke as master of the posts in February 1512. Belatedly, in 1517, he was officially appointed to the office of Governor of the King's Posts'', a precursor to the office of Postmaster General of the United Kingdom, by
Henry VIII. In 1609 it was decreed that letters could only be carried and delivered by persons authorised by the Postmaster General. In 1655
John Thurloe became Postmaster-General, a post he held until he was accused of treason and arrested in May 1660. His spies were able to intercept mail, and he exposed
Edward Sexby's 1657 plot to assassinate
Cromwell and captured would-be assassin
Miles Sindercombe and his group. Ironically, Thurloe's own department was also infiltrated: his secretary
Samuel Morland became a
Royalist agent and in 1659 alleged that Thurloe,
Richard Cromwell and Sir
Richard Willis – a
Sealed Knot member turned Cromwell agent – were plotting to kill the future King
Charles II. About forty years after his death, a false ceiling was found in his rooms at
Lincoln's Inn, the space was full of letters seized during his occupation of the office of Postmaster-General. These letters are now at the
Bodleian Library. In 1657 an act of the Commonwealth Parliament, entitled 'Postage of England, Scotland and Ireland Settled', set up a system for the British Isles and enacted the position of Postmaster General. The act also reasserted the postal monopoly for letter delivery and for post horses. After the
Restoration in 1660, a further act, the
Post Office Act 1660 (
12 Cha. 2. c. 35), confirmed this and the post of Postmaster-General, the previous
Cromwellian act being void. 1660 saw the establishment of the General Letter Office, which would later become the
General Post Office (GPO). with regulatory functions transferring to the
Home Office, the Post Office retaining control of
television licensing. Since 1992, most regulatory functions formerly conducted by the Postmaster General generally fall within the remit of the
Secretary of State for Culture, Media and Sport, although the present-day
Royal Mail Group was overseen by the
Secretary of State for Business, Energy and Industrial Strategy until
flotation. ==Masters of the King's Post==