The Post Office demonstrates how telegrams are sent and how mail is collected by train.
Introductory intertitle reads: "If ever you want to muster Young Britain, get the Post Office to give a free exhibition of their ingenious appliances and watch the invasion."
C/Us of crowd of young boys queuing at a desk for a chance to send a telegram. A woman stamps their "free souvenir messages." Narrator states that the boys' imagination often deserts them once they get to the counter. He lists some of the messages allegedly sent by these schoolboys including "I'm not lost yet" and "Dear mother, I hope you are better now".
C/U of man typing the messages in to the telegraph "teleprinter". C/U of the woman operating another part of the telegraph operation. She feeds a thin tape through a machine. M/S of a young man in a bellboy type outfit handing out telegrams to the young boys and girls who crowd around him. They have been transmitted from the other side of the exhibition.
"The mail 'pick up' and depositor, too." M/S of a model of a Post Office sorting carriage such as are used on the night mail trains which travel from London to Glasgow. C/U of eager looking schoolboys in caps. A man describes how the mail trains operate, showing how the nets are dropped and pick up the mail bags. "Here's an actual one at work. (Normal and slowed)." Low angle shot of a mail train passing a post where it grabs the mail bags. Shot from another angle in slow motion showing pick up.
Note: this is possibly filmed at the Schoolboys' Exhibition of 1932? Or similar exhibition.