GB Post Major Milestones ?

I've tried to build a list of the major milestones that affected the Postal service (excluding other services such as Telegrams, Telephone, Post Office Savings Bank, ....

•             Opening of the Royal Post service to the public in Tudor/Stuart times
• 1635:    Regular services along the Post Roads (Thomas Witherings)
• 1661:    Postmark or Bishop mark (Henry Bishop)
• 1680:    London Penny Post (William Dockwra)
• 1696:    Turnpike roads (1696-1888), McAdam (Macadam) roads from 1820, tarmacadam (Edgar Hooley) from 1901
• 1720:    Cross Posts (Ralph Allen of Bath)
• 1784:    Mail coaches  (John Palmer of Bath),
• 1793:    First Provincial Penny Post
• 1801:    Fifth Clause Posts enacted
• 1830:    Railways, TPOs & (1856-1905) RSOs.  Last TPO in 2004.
• 1840:    Uniform Penny Post (Robert Wallace, Rowland Hill)
• 1853:    Pillar Boxes (Anthony Trolloppe)
• 1870:    Postcards
• 1883:    Parcel Post
• 1892:    Post Office workers allowed public meetings, the beginning of unionisation
• 1897:    Countrywide delivery
• 1898:    Imperial Penny Post (Henniker Heaton)
• 1914:    Postal service during WW I, & women increased role in the Post Office
• 1935:    Mechanisation – continuing implementation (improvement ?) to the present day
• 1959:    Postcodes
•            Centralisation – continuing implementation to the present day
•            Slogan cancels, Local Slogan cancels, Commercial cancels
•            1^st & 2^nd class mail

And into the future ?

• Privatisation and competition (where there is money in it)
• Restrictions and reductions in delivery based on cost to deliver ?

Any corrections, amendments or additions welcome !