Light Straw ATE

Enter the world of operator connected calls, Subscriber Trunk Dialling, Strowger switching and much more...

Visit the Post Office Tower; the Telephone Managers' Office; explore the Telecoms Engineering Centre; and learn about the last two TXE4s to be taken out of service.


Includes GPO Clock Systems.

GPO History


Here we look at the GPO, Royal Mail, Post Office Savings Bank, ERNIE, National Giro and more...

Includes GPO vehicle history.

Telecoms at Bletchley Park

The GPO's expertise from its research department at Dollis Hill was invaluable in assisting Bletchley Park to develop robust, electro-mechanical machines which could be used to break the wartime codes.