Postmaster General Sir Kingsley Wood shows off a new system for telephones.
Sir Kingsley Wood, the Postmaster General, opens new telephone exchange in London.
Roundup of the latest world's news
Trainees at a Bristol post office school see how telephone kiosks and overhead cables are erected.
A device that attaches to telephones which records numbers and times of calls made.
A look at the history of the telephone and the improvements which have been made.
Good footage of engineers performing various tests on telephones at the Post Office Training School.