In the years after both world wars re-establishing full use of services became a priority. During the 1920s and 1930s new equipment increased the rate at which parcels could be handled, and the growing use of road transport increased the speed of collections and deliveries.

In its vehicles, the Post Office had a valuable advertising medium, making it possible to reach out to every part of the country. Reporting in 1935, Stephen Tallents described Cheaper Parcel Post as one of the excellent letter-press strip posters.

Cheaper Parcel Post was part of a campaign to make the public aware of the new cheaper parcel post rates in Great Britain and Northern Ireland, as a result of reforms brought about by improvements in parcel post methods in recent years.

The expansion of capacity made possible by mechanisation and technology is communicated in The Post Office handles 23,000,000 letters day, one of a series promoting volumes of the services in the years after World War Two.

The Post Office Guide and books of stamps are among the products that recur in poster design. Buy stamps in books may have been a direct response to a report noting the particular decline in sales in 1958. Highlighting the "sudden letter you write on Sunday" it stated "if you have a book in your pocket the problem is solved."

Posters such as these advertised the services of the Post Office. They informed the public of such things as current postal rates, telephone services and even reminded people to buy their wireless licence.