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Alphabetical Listings

A

Aberdeen ROC Group No.29 See Royal Observer Corps.
AD163WW2 Observer's Telephone
Ch.17
AD34601st Generation Teletalk Device
Ch.17
AD80102nd Generation Teletalk Device
Ch.17
Address Codesfor printed messages
Ch.20
Air Defence Operations Centre(ADOC)
Ch.11
All Underground Networkfor EMSS
Ch.25
Analogue Speech MultiplexPrinciple Explained
Ch.39
Anchor Underground ExchangeBirmingham
Ch.22
Anstruther ZHQ : Scottish Northern Zone See Regional Government
ARC 52Air-Ground transceiver at RGHQ
Ch.6
AUTEX 100 & 1600Local Authority Message Switch
Ch.20
Autowailer The Home Office standard device
Ch.15
AWDREYAtomic Weapons Detection and Estimation of Yield
Ch.4
Ayr ROC Group No.25 See Royal Observer Corps.

B

BackboneMicrowave Network
Ch.26
Ballistic Missile Early Warning System BMEWS
Ch.2
Ballmena RGHQ 11.1 See Regional Government
Basingstoke RGHQ 6.2 See Regional Government
Bawburgh RGHQ 4.1 See Regional Government
BBCthe Wartime Broadcasting Service
Ch.9
Bedford ROC Group No.7 See Royal Observer Corps.
Belfast ROC Group No.31 See Royal Observer Corps.
Belfast RGHQ 11.1 See Regional Government
Birmingham Anchor Underground Exchange
Ch.22
Bolt Head RGHQ 7.2 See Regional Government
Bomb Pressure IndicatorBPI
Ch.3
Bomb SizeCalculation
Ch.4
Brackla RGHQ 8.1 See Regional Government
Bristol ROC Sector No.12 See Royal Observer Corps.
British TelecomCompany History and Defence Projects
Ch.21
British Telecom War OrganisationInternal Emergency Communications
Ch.28

C

Carlisle ROC Group No.22 See Royal Observer Corps.
Carmarthen ROC Group No.13 See Royal Observer Corps.
Carrier Broadcast Systems [see Wire Broadcast]
Carrier Area Numbering listing of CCP sites (WB400 / 1400)
Ch.2
Carrier Control Point (CCP) [see Wire Broadcast]
Carter Sirens
Hand Operated
Ch.16
Mains Powered
Ch.14
Castle Castings Siren
Hand Siren
Ch.16
Mains Siren
Ch.14
Central Government War Headquarters
Locationnear Corsham
Ch.8
Woodland Switchboardconnections to EMSS
Ch.24
Chilmark RGHQ 7.1 See Regional Government
ChilternDesign of Concrete Microwave Tower
Ch.26
Civil DefenceInterim Radio Network
Ch.36
Cluster, of ROC Posts
Landlines1st & 2nd Generation
Ch.17
Mapsfor every Group
Ch.1
Wireless Sets1st & 2nd Generation
Ch.18
Colchester ROC Group No.4 See Royal Observer Corps.
Compressed Air SirenField Trial
Ch.14
Contact Editorof this Website
ContactorPower Relay for Siren
Ch.15
Control by RadioCONRAD
Ch.30
Coventry ROC Group No.8 See Royal Observer Corps.
Crowborough RGHQ 6.1 See Regional Government
Cultybraggen ZHQ : Scottish Northern Zone See Regional Government

D

Defence Communications ProjectsGPO, PO Tele, BT
Ch.21
Detection of Air Attack by BMEWS and RADAR
Ch.2
Development of Remote Siren Controlby the GPO
Ch.35
Documentation LibraryIndex
DL1
Circuit Diagramsfor WB400 & 1400
DL5
Documentationfor WB400 & 1400
DL4
MappingMaps of Posts, Group and RGHQ Boundaries
DL3
ROC Related Documents
DL6
Dover Castle RGHQ 6.1 See Regional Government
Drakelow RGHQ 9.2 See Regional Government
Dundee ROC Sector No.28 See Royal Observer Corps.
Duplex Telegraph on Speech CircuitS+DX Explained
Ch.38
Durham ROC Group No.23 See Royal Observer Corps.

E

East Kilbride ZHQ : Scottish Western Zone See Regional Government
Edinburgh ROC Group No.24 See Royal Observer Corps.
Editor's Searchfor ROC Inter-group VHF Radio Links in 1980
Ch.37
Emergency Circuitsto ROC Monitoring Posts
Ch.17
Emergency Communications NetworkECN
Ch.20
Emergency Manual Switching SystemEMSS
Ch.24
Emergency Power Supplyin Telecoms Buildings
Ch.23
Equipment Digital Line 8AEDL8 for All Underground
Ch.25
Exeter ROC Group No.10 See Royal Observer Corps.

F

Fallout, Radioactive
Plotting Path
Ch.4
Warning Districts
Ch.4
Warning Signalusing Maroon
Ch.3
Fixed Survey MeterFSM
Ch.3
Four Minute Warning
Ch.2
Formatof Telegraph Messages
Ch.20
Frost Thermostatfor Sirens
Ch.14

G

General Post Office GPODefence Projects and Company History
Ch.21
Gents' Syren
Ch.14
Government
CorshamCentral Government War Headquarters
Ch.8
Function of Regional GovernmentRGHQ
Ch.6
Physical Locations of RGHQ
Ch.7
Ground Zero IndicatorGZI
Ch.3
Group - UKWMO
Locations
Ch.1
Map of Postswithin the group
Ch.1
Operational Functions
Ch.4
Guardian Underground ExchangeManchester
Ch.22

H

Hack Green RGHQ 10.2 See Regional Government
HANDEL
Overview History of development
Ch.2
1st Generation
Ch.10
2nd Generation
Ch.11
Hardened Repeater StationsPR1 & PR2 type
Ch.22
Heaters for Sirens
Ch.14
Hertford RGHQ 4.2 See Regional Government
Hexham RGHQ 2.2 See Regional Government
High WycombeRAF station, HANDEL : ADOC / PWHQ / Strike Command
Ch.11
Home Office, Autowailer for siren control
Ch.15
Home Office, Directorate of TelecommunicationsD of T
Ch.31
Horsham ROC Sector No.2 See Royal Observer Corps.

I

Inter ROC Group VHF Network before the installation of RN1 & 2 backbone
Ch.19
The Editor's Search for the VHF radio links - circa 1980
Ch.37
Interim Civil Defence Radio Network
Ch.36
Inverness ROC Group No.30 See Royal Observer Corps.

K

Kelvedon Hatch RGHQ 5.1 See Regional Government
Kingsway Underground Telephone ExchangeLondon
Ch.22
Kirknewton ZHQ : Scottish East Zone See Regional Government

L

Last Ditch NetworkFirst Generation Single Sideband Radio
Ch.34
Lincoln ROC Sector No.15 See Royal Observer Corps.
Local Control of SirenThe Autowailer
Ch.15
Locations of
Monitoring PostsCluster Maps
Ch.1
RGHQRegional Govt. HQ. Grid References and Bunkers
Ch.7
ROC Group & Sector BunkersMap References
Ch.1
London Kingsway Underground ExchangeLTK
Ch.22
Loud Speaking Telephone
AD34601st Generation Teletalk
Ch.17
AD80102nd Generation Teletalk
Ch.17
Loughborough RGHQ 3.2 See Regional Government
Lyndon Green (Birmingham)Protected Telephone Repeater Station
Ch.22

M

Maidstone ROC Group No.1 See Royal Observer Corps.
Manchester Guardian Underground Exchange
Ch.22
Maroonfor Fallout Warning
Ch.3
Master Post Wireless Networks
1st GenerationVHF Highband
Ch.18
2nd GenerationVHF Lowband : RN4
Ch.18
Message Switch
AUTEX 100 & 1600 Local Authority Small Switch (2nd Generation)
Ch.20
CASE M.S.X. RGHQ & UKWMO Large Switch (2nd Generation)
Ch.20
Torn Tape Relay Centre RGHQ & UKWMO (1st Generation) Switching
Ch.19
Microwave NetworkGPO / BT
Ch.26
Monitoring Posts - Nuclear
Communications
Landlineby teletalk
Ch.17
Wirelessby VHF radio
Ch.18
Instruments
Ch.3
Maps of Posts
On Screen Viewing
Ch.1
Printable Version
DL3
Physical Appearance
Ch.3
MOULDHome Defence Radio
Ch.29

N

Norwich ROC Group No.6 See Royal Observer Corps.
Nuclear Monitoring Posts
Communications
Landlineby teletalk
Ch.17
Wirelessby VHF radio
Ch.18
Instruments
Ch.3
Maps of Posts
On Screen Viewing
Ch.1
Printable Version
DL3
Physical Appearance
Ch.3
Nuclear Reporting Cell
Ch.5

O

Oxford ROC Group No.3 See Royal Observer Corps.

P

Police and Fire Radio Schemes
Before 1987
Ch.32
After 1987
Ch.33
Pneumatic SirenField Trial
Ch.14
Post Office TelephonesDefence Projects and Company History
Ch.21
Posts - Nuclear Monitoring
Communications
Landlineby teletalk
Ch.17
Wirelessby VHF radio
Ch.18
Instruments
Ch.3
Maps of Posts
On Screen Viewing
Ch.1
Printable
DL3
Physical Appearance
Ch.3
Preston HANDEL Warning CentreAt Sector HQ
Ch.11
Preston ROC Sector No.21 and See Royal Observer Corps.
PR1 & PR2Protected Telephone Repeater Stations
Ch.22
Primary War HeadquartersPWHQ : RAF High Wycombe
Ch.11
Public Warning System The development of the UK's HANDEL Network
Ch.2
Pye SSB125Single Sideband Radio for the Last Ditch Network
Ch.34

Q

Q-Codeseries of "THQ 1141" Engineering Codes
Ch.24
Queslett (Birmingham)Protected Telephone Repeater Station
Ch.22

R

Radio Networks - Home Office D-o-T
Landline BackupFirst Generation - before RN1 RN2
Ch.19
Last Ditch NetworkFirst Generation LDN
Ch.34
RN1 & RN2Spine and Branch
Ch.20
RN3UKWMO Onsite Security
Ch.20
RN4ROC Post Radio
Ch.18
RN5LDN Replacement Proposal
Ch.34
Regional Government
Functionof Regional Headquarters (RGHQ)
Ch.6
Message Relay CentreTorn Tape (1st generation)
Ch.19
Message SwitchCASE M.S.X. (2nd generation)
Ch.20
Physical Locationsof Regional Headquarters (RGHQ)
Ch.7
Remote Controlof Sirens, earlier versions before carrier broadcast
Ch.35
Resilient CommunicationsLandlines
Ch.22
Rothwell Haigh (Leeds)Protected Telephone Repeater Station
Ch.22
Royal Observer Corp
Communications between UKWMO Group Headquarters
First GenerationSpeech, Telegraph and Radio
Ch.19
Second GenerationCommunications Upgraded
Ch.20
The Editor's Search for First Generation of Inter-group VHF Radio Links
Ch.37
English Heritage Museumthe Former HQ at York
Ch.1
Locations of Group Controls and Areas
Ch.1
Monitoring Posts
Communications
Landlineby teletalk
Ch.17
Wirelessby VHF radio
Ch.18
Instruments and External Appearance
Ch.3
Maps of
For On Screen Viewing
Ch.1
Printable Version
DL3
Nuclear Reporting Cell
Ch.5
Rotor Bunkersused for RGHQ
Ch.7

S

SCVFSingle Channel Voice Frequency, Telegraph
Ch.20
Sector HQfunction of
Ch.4
Service Electric SECOMAK Sirens
Hand Operated
Ch.16
Mains Powered
Ch.14
Shipton RGHQ 2.1 See Regional Government
Shrewsbury ROC Group No.16 See Royal Observer Corps.
Siren, Electrical
Early Remote Control Systemsbefore Carrier Broadcast
Ch.35
InstallationsAutowailer, Switch Panel and Siren Mounting
Ch.15
MechanismThe noise maker
Ch.14
Signalling ReceiverWB600
Ch.10
Signalling ReceiverWB1400
Ch.12
Siren, Hand
Carter Design
Ch.16
Secomak Design
Ch.16
Skendleby RGHQ 3.1 See Regional Government
Southport RGHQ 10.1 See Regional Government
Speech MultiplexExplained for Analogue Radio and Line
Ch.39
Speech plus Duplex TelegraphS+DX Explained
Ch.38
Standby Generatorin Telecoms Buildings
Ch.23
Stockport (Manchester)Protected Telephone Repeater Station
Ch.22
Strike CommandRAF High Wycombe
Ch.11
SSB125Pye Radio for Last Ditch Network
Ch.34
Swinton (Manchester)Protected Telephone Repeater Station
Ch.22
Swynnerton RGHQ 9.1 See Regional Government
Syren - the British alternative spelling of siren.
System ESiren Control before Carrier Broadcast
Ch.35

T

Telecoms Buildings
Emergency Power Supplyfor exchanges and repeaters
Ch.23
Protected Telephone Repeater Stationtypes PR1 & PR2
Ch.22
Underground Trunk Exchanges at Birmingham, London & Manchester
Ch.22
Telegraph MessagesFormat of 2nd Generation
Ch.20
Teleprinter No.7
Ch.19
Teletalk
1st GenerationAD3460
Ch.17
2nd GenerationAD8010
Ch.17
Torn Tape Relay Centre
Ch.19
Transistorised 24-Channel Carrier Equipmentfor "All Underground" network
Ch.25
Triangulationof Ground Zero
Ch.4

U

Uddingston (Glasgow)Protected Telephone Repeater Station
Ch.22
UKWMO United Kingdom Warning and Monitoring Organisation See Royal Observer Corps.
Ullenwood RGHQ 7.1 See Regional Government
Underground Telephone Exchanges at Birmingham, London & Manchester
Ch.22

V

VHF Radio
Linking UKWMO Controls1st Generation
Ch.19
Monitoring Post Radio1st & 2nd Generation
Ch.18
Police and Fire1st Generation
Ch.32
Police and Fire2nd Generation
Ch.33

W

Warmley (Bristol)Protected Telephone Repeater Station
Ch.22
Warning Districts- Fallout
Ch.4
Warning MessagesColour coded Red, Black and White
Ch.2
Wartime Broadcasting ServiceWTBS
Ch.9
WebsiteContact Owner of this
Winchester ROC Group No.14 See Royal Observer Corps.
Wire Broadcast Systems - Civil Defence
WB200Field Trial of Speech Broadcast by Carrier
Ch.2
WB400 and WB600Civil Defence : 1st. Generation
Ch.10
Carrier Control Point(CCP)
Ch.10
Carrier Distribution Network
Ch.10
Control Point Exchange(CPE)
Ch.10
Maintenance AidsTesters
Ch.10
Police Routine Tests
Ch.10
Siren Controlat CCP
Ch.10
Siren Signalling ReceiverWB600
Ch.10
Speech ReceiverWB400
Ch.10
User Instructions
Ch.10
Local Distribution to Warning Points
Ch.10
WB1400Civil Defence : 2nd. Generation
Ch.11
Carrier Control Point(CCP)
Ch.11
Carrier Distribution Network
Ch.12
Control Point Exchange(CPE)
Ch.11
Local Distribution to Warning Points
Ch.12
Maintenance AidsTesters
Ch.12
Police Routine TestsQuarterly test of warning receiver
Ch.11
Siren Signalling Receiver
Ch.12
Speech Receiver
Ch.12
User InstructionsBooklet from Derbyshire
Ch.12
WB1800 HANDEL
Ch.11
National Warning Centre Console and Test Panel
Ch.11
Wire Broadcast Systems - Not Civil Defence
WB300AWRE Radiation Leak
Ch.13
WB500Electricity Control
Ch.13
WB700Local telephone Call Charging
Ch.13
WB800Planned Music
Ch.13
WB900Shared Service Replacement
Ch.13
WB1000Alarms by Carrier
Ch.13
Wireless - (see Radio)
Woodland ExchangeConnection to EMSS
Ch.24
WTBSWartime Broadcasting Service
Ch.9
Wrexham ROC Group No.17 See Royal Observer Corps.

Y

Yeovil ROC Group No.9 See Royal Observer Corps.
YieldBomb Size Calculation in Group HQ
Ch.4
York ROC Group No.20 (Now English Heritage Museum at Acomb) See Royal Observer Corps.

Individual Page Topics

Development of the National Warning SchemeOutline of HANDEL
Ch.2
WB400 & WB6001st Generation of Carrier Broadcast
Ch.10
WB1400 Part 12nd Generation : Warning Centre to Carrier Distribution
Ch.11
WB1400 Part 22nd Generation : Distribution to Users and the Receiver Hardware
Ch.12
Early Remote Control for Sirensbefore Carrier Broadcast
Ch.35
Mains Powered Warning Sirenin urban areas
Ch.14
Hand Operated Sirenat Carrier Warning Points
Ch.16
Siren Control GearSwitch panel, Autowailer
Ch.15
UKWMO Structure and BunkersOrganisation and Locations
Ch.1
ROC Post InstrumentsMeasuring nuclear detonations and fallout
Ch.3
Group and Sectors FunctionDetailing their work in Monitoring and Warning
Ch.4
RGHQ Tasks & CommunicationsRegional Government in war
Ch.6
Central Government War HQTop Secret Underground HQ in Corsham
Ch.8
RGHQ Structure and BunkersOrganisation and Locations
Ch.7
ROC Post Landline Communications1st & 2nd Generation of
Ch.17
ROC Post Radio Communications1st & 2nd Generation of
Ch.18
First Generation Communications Systemsfor UKWMO & RGHQ
Ch.19
Second Generation Communications Systemsfor UKWMO & RGHQ
Ch.20
Nuclear Reporting CellOperated by ROC personnel
Ch.5
Interim CD Radio SchemePlugging a gap
Ch.36
BT Defence NetworkBT War Organisation
Ch.28
Wartime Broadcasting ServiceBBC WTBS keeping the public informed
Ch.9
Telecoms Emergency Power Suppliesfor when the mains power fails in war
Ch.23
G.P.O. - P.O. Telephones - BT Company history and defence work
Ch.21
Miscellaneous Wire Broadcast Systemsnot for Civil Defence purposes
Ch.13
GPO / BT Microwave BackboneProtection for important long distance communications
Ch.26
All Underground NetworkA protected network for EMSS circuits
Ch.25
GPO / BT Network ResilienceThe plans to keep going in war
Ch.22
Home Office Directorate of TelecommunicationsBlue Light and UKWMO & RGHQ Radio
Ch.31
Pre 1987 Home Office Radiofor Police and Fire Services
Ch.32
Post 1987 Home Office Radiofor Police and Fire Services
Ch.32
My Search for ROC Radio LinksThe highs and lows
Ch.37
Speech plus Duplex TelegraphyS+DX sending both along one set of wires
Ch.38
MOULD CommunicationsMilitary Radio for Home Defence
Ch.29
CONRAD CommunicationsPost Nuclear Strike Military Support of RGHQ
Ch.30
EMSS CommunicationsEmergency Manual Switching System
Ch.24
LDN CommunicationsLast Ditch Network (HF Radio)
Ch.34
Telephone Preference ControlAvoiding network overload
Ch.27
Speech MultiplexHow it works
Ch.39

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