UKWMO and Emergency Services Communications

Navigating through the Site's Contents

Please use the tabs at the top of every page. Clicking the top level introduces a different group of topics in the lower level, clicking these loads a new page. The five tabs currently visible on the lower level give only a brief summary of each topic but it is worth looking at these before progressing onto the detailed topics. To help maintain continuity the footer on some pages have links to related topics.

Web Site History and Future

This site was created in 2001 and contained just a few pages about the public warning system. Since then its grown to 34 Pages thanks to a lot of helpful feedback and encouragement from so many people able to plug the holes in my knowledge. I am always pleased to receive all kinds of information and to hear of your experiences related to the topics on this site as there are still pieces of the jigsaw missing.

Are you holding a piece of the jigsaw ?

Many of us signed the Official Secrets Act, this protected information for 30 years, so anything pre-1987 is now open. The National Archives in Kew have files previously classified Secret open to public inspection which form the basis for a number of pages on this website. The Freedom of Information Act, has opened younger files too.

There are still a few of foggy areas where your knowledge may help provide a better understanding. Please click the link below to see the burning issues.

Issues Still to be Resolved

Steve Scanlon - The Web Site Owner

I became interested in the UK Civil Defence for the Cold War, as a result of working as a engineer for 'Post Office Telephones' later privatised and renamed 'British Telecom'. Between 1978 and 1981 I maintained the early warning equipment and visited ROC posts in part of North Northamptonshire and South Leicestershire. At the time I never disclosed this information even to my closest friends. Now twenty years have passed since the Cold War ended the Internet provides a good medium to disseminate the details of these defunct systems.

Contact Details for Steve Scanlon


Site Last Updated : 29-JAN-2018

29/01/2018 Proposed RN5 replacement Last Ditch Network HF Radio added to Post Strike / LDN page.

28/12/2017 4 new thermostat photos from Paul Lawrence HANDEL / Power Siren page. Updated RBDxxx routing codes text in Communications / To Military

11/12/2017 HANDEL / WB1400 Pt1 Added topic East Kilbride CCA receiver points. Making more real estate removing CCP image map, moved images to CCP gallery.

28/11/2017 Post Strike / EMSS Rewrite of page thanks to Dave McKay G1JWG finding a EMSS network diagram in National Archives.

05/11/2017 HANDEL / Power Siren Added 2 photos from Trevor Bishenden, 1 from Roy Coulter to Siren Station Gallery. Minor text changes.

05/10/2017 New section in HANDEL / HANDEL Warning System a BT Heritage Film from 1982, Wire Broadcast Warning Systems for the Future.

25/09/2017 HANDEL / Power Siren Added Switch Panel Type III and 8 new photos from Paul Lawrence: SECOMAK siren.

09/09/2017 Added Switch Panel in situ (tnx Richard Bowden) and revised layout of HANDEL / Power Siren page.

03/07/2017 Related Topics / GPO->BT Added 6 photos of the construction of Portsdown PR1.

13/05/2017 HANDEL / before HANDEL Six additional photos of control unit to System-E gallery from the BT Archives.

12/05/2017 From BT Archives: WB200 Carrier Control Point, 2 photos added HANDEL / Warning System. Gallery of Unit Sig. WB600 added to HANDEL / WB400&600

10/05/2017 Revised Overview / Civilian Government adding BT Archive material and using accepted designation CGWHQ consistently across website.

29/04/2017 Added 12 Images to the galleries from BT Archives, updating text in various topics on HANDEL / WB400&600 page.

20/04/2017 Exploring the BT Archives online.

HANDEL / WB400&600 Added internal images of exchange distribution cabinets. WB600 Gallery added. HANDEL / before HANDEL Added early siren control systems, post WWII but pre-HANDEL, outline description of D, DX, E, F, G, K and L. Related Topics / Other WB systems Added photos of WB800, Music distribution. Related / GPO =>BT Major revision, adding extracts from Engineer in Chief Reports mapping the development of communications resilience in the early cold war period. Gallery of 21 images of Anchor Exchange construction. The BT Long Haul Microwave communications network - topic revised further and adding 3 images.

10/03/2017 Revised Communications / Networks Era 1 "Radio Backup to Landline" adding Coventry aerials photo. Added new topic "Posts to Group HQ Radio".

27/02/2017 Revised and moved some WB400 text from HANDEL / Warning System to HANDEL / WB400 adding a HANDEL section with diagram of remote clock control.

23/01/2017 Added tunnel plan and equipment layout of Birmingham Anchor Exchange to gallery Related Topics / GPO->BT

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