A telegram is typed on a teleprinter machine in London, and is printed out in Edinburgh.
Full titles read: "Teleprinter. As a result of the development of the teleprinter by the Post Office, instead of competing on somewhat unequal terms, telephony & telegraphy have emerged as complementary services."
Various shots show an office in London where a secretary places a call to Edinburgh. In both offices the secretaries switch their phone lines from telephone to their teleprinter machines and a telegram is printed out. The London secretary types the message on her machine and it is printed out in Edinburgh; another copy is printed on the London machine.