Home of the Speaking Clock

Home of the Speaking Clock

The former post office building that helped crack the code.

Location: Flowers Close, Brook Road, Dollis Hill

Description: This was the home of the Post Office Research Station from the 1920's to the 1970's. This station was dedicated mainly to research in telecommunications and the teams at Dollis Hill played a leading role in a number of key advances in the field.

In 1914, the Postmaster General agreed that the Post Office needed improved facilities for research and that a permanent Engineering Research Station should be established. In 1919 the Treasury agreed to buy this site in Dollis Hill. Initially, staff worked in wooden ex-army huts until the permanent buildings had been completed. The main research building opened in 1923.

In 1936, the Speaking Clock - known to London users as TIM - was designed and constructed there by Dr E.A. Speight.

The Dollis Hill teams were also responsible for the development of the Trans-Atlantic telephone cable and for providing the links for outside television broadcasts, such as the first broadcast of the Remembrance Day service in 1937.

The site also played a role in the deciphering of the German Enigma code during World War II. Tommy Flowers put his Colossus computer together here, and later reassembled it at Bletchley Park.

Themes: IndustryIndustry Theme  PioneerPioneer Theme
Home of the Speaking Clock

The former post office building that helped crack the code.

Ranking This Month: 2258/3064

Pages Hit This Month: 29

Your Comments:

Your email will ONLY be used once, to confirm the publication of your comments. We value your contribution and privacy.

Anti-spam Security: Please enter this code:

Other places nearby:

Thomas Crapper was here», 5.9km

The Oldest Bank in London», 6.3km

Matchmakers Wharf», 8.9km

William Tierney Clark lived here», 4.9km

London Glassblowing Company», 7.8km

The Ivory House», 8.1km

William Morris' Birthplace», 9.1km

London Museum of Water & Steam», 5.4km

Tetley's Home of Tea», 7.5km

News International HQ», 8.2km

Location Pinpointed:

Open Street Maps», Google Maps»