15/15 As it sits on the brink of privatisation, what does the Royal Mail mean today?
14/15 When a national postcode system was introduced in the 1970s, it met with fierce resistance
13/15 In the 1930s, the GPO was a model employer, offering staff a secure career path.
12/15 In 1914, the post office was called upon to play a vital role in the country's war effort.
11/15 In 1870, the telegraph system came under the control of the post office.
10/15 Dominic Sandbrook investigates the industrial action of the postmen in 1890.
9/15 From 1862, the Post Office Savings Bank offers savings accounts to poorer people.
8/15 Dominic Sandbrook investigates the role of love letters in the history of the Post Office.
7/15 Thanks to cheap postage, businesses could advertise and interact with people more directly
6/15 Dominic Sandbrook looks at the arrival of Universal Penny Postage in 1840.