Carrier Control Areas

List of Carrier Control Areas

The tables below list the confirmed Carrier Control Areas (CCA) each with a Carrier Control Point (CCP) usually located in a police station within the area. Each CCP has a parent ROC Group Headquarters who would issue fallout warnings for Warning Districts within the CCA. List 1 are CCA where the number and parent ROC Group are known. List 2 are CCA where the parent ROC Group is known, but not the numbering.

The table below is the key for the ROC Group abbreviations used in the main listings.

ROC Group by Sector
Metropolitan	Midland	Southern	Western	Caledonian
COL Colchester	BED Bedford	BRI Bristol	BEL Belfast	ABE Aberdeen
HOR Horsham	COV Coventry	EXE Exeter	CAR Carlisle	AYR Ayr
MAI Maidstone	LIN Lincoln	SHR Shrewsbury	DUR Durham	DUN Dundee
OXF Oxford	NOR Norwich	SWA Carmarthen	NWA Wrexham	EDI Edinburgh
WIN Winchester	YOR York	YEO Yeovil	PRE Preston	INV Inverness

List 1 Carrier Area Numbering and ROC HQ known

Carrier Control Area	Area Number	ROC Group
Penzance	002	EXE
Truro	003	EXE
Bodmin	005	EXE
Plymouth	006	EXE
Launceston	007	EXE
Kingsbridge	008	EXE
Bude	009	EXE
Okehampton	010	EXE
Exeter	011	EXE
Paignton	012	EXE
Barnstaple	013	YEO
Weston-s-Mare	018	YEO
Dorchester⊗	019	YEO
Yeovil	020	YEO
Bristol	022	BRI
Bournemouth	025	WIN
Salisbury	027	WIN
Bath	029	BRI
Swindon	031	OXF
Cirencester	033	OXF
Gloucester	034	OXF
Swansea	036	SWA
Carmarthen	037	SWA
Cardiff	041	SWA
Newport	043	BRI
Merthyr Tydfil	044	SWA
Abergavenny	046	BRI
Brecon	047	SWA
Llandrindod Wells	048	SWA
Worcester	052	BRI
Hereford	053	BRI
Wolverhampton	056	SHR
Stoke	063	SHR
Stafford	064	SHR
Burton on Trent	065	COV
Nuneaton	066	COV
Worksop	068	LIN
Leicester	070	COV
Melton Mowbray	071	LIN
Oakham	072	LIN
Peterborough	073	BED
Huntingdon	074	BED
Kettering	075	BED
Northampton	076	BED
Rugby	077	COV
Market Harborough	078	BED
Nottingham	079	COV
Matlock	080	COV
Derby	081	COV
Mansfield	082	COV
Newark	083	LIN
Wisbech	086	NOR
Chelmsley Wood	089	COV
Redditch	090	COV
Stourbridge	091	SHR
Walsall	092	COV
Lichfield	093	COV
Thanet	108	MAI
Ashford	111	MAI
Hastings	115	MAI
Brighton	117	MAI
Crawley	118	HOR
Dorking	119	HOR
Horsham	120	HOR
Worthing	121	HOR
Haslemere	125	HOR
Guildford	126	HOR
Camberley	127	HOR
Woking	131	HOR
Egham	132	HOR
Colchester	150	COL
Cambridge	151	COL
Newmarket	152	COL
Bury St. Edmunds	153	COL
Diss	155	NOR
King's Lynn	157	NOR
Fakenham	158	NOR
Norwich	159	NOR
Cromer	160	NOR
Gt. Yarmouth	161	NOR
Colwyn Bay	169	NWA
Bangor, Wales	172	NWA
Glossop	174	PRE
Macclesfield	175	SHR
Northwich	177	SHR
Wigan	179	PRE
Bolton	180	PRE
Rochdale	181	PRE
Preston	183	PRE
Blackburn	184	PRE
Sheffield	189	YOR
Barnsley	190	YOR
Doncaster	191	LIN
Chesterfield	192	COV
Gainsborough	193	LIN
Lincoln	194	LIN
Louth	195	LIN
Leeds	196	YOR
Wakefield	197	YOR
Huddersfield	198	YOR
Halifax	199	PRE
Bradford	200	YOR
Scunthorpe	212	YOR
Grimsby	213	LIN
Bishop Auckland	223	DUR
Durham	224	DUR
Darlington	227	DUR
Middlesbrough	228	DUR
Kirkintilloch	230	DUN
Milngavie	231	DUN
Johnstone	232	AYR
East Kilbride	233	AYR
Fort William	234	INV
Lochgilphead	240	INV
Campbeltown	241	AYR
Brodick, Arran	242	AYR
Ayr	243	AYR
Stranraer	244	AYR
Dumfries	246	AYR
Lanark	247	EDI
Motherwell	248	AYR
Kilmarnock	249	AYR
Greenock	253	AYR
Edinburgh	254	EDI
Galashiels	255	EDI
Coldstream⊗	256	EDI
North Berwick	257	EDI
Bathgate	258	EDI
Dunfermline	259	DUN
Perth	260	DUN
Dundee	263	DUN
Montrose	264	DUN
Kirkcaldy	265	DUN
Aberdeen	266	ABE
Aboyne	267	ABE
Grantown-on-Spey	268	ABE
Elgin	269	ABE
Huntly	270	ABE
Peterhead	272	ABE
Inverness	273	INV
Kyle	274	INV
Stornoway	277	INV
Thurso	280	INV
Wick	281	INV
Tain⊗	282	INV
Kirkwall	286	ABE
Londonderry	290	BEL
Stirling	300	DUN
Oban	301	INV

List 2 CCA Numbers Unknown

Carrier Control Area	Area Number	ROC Group
Bedford		BED
Edgware		BED
Hertford		BED
Stevenage		BED
Watford		BED
Ballymena		BEL
Coleraine		BEL
Downpatrick		BEL
Enniskillen		BEL
Lisburn		BEL
Magherafelt		BEL
Newry		BEL
Omagh		BEL
Portadown NI		BEL
Chippenham		BRI
Loughton⊗		COL
Hayes		HOR
Merstham⊗		HOR
Boston		LIN
Grantham		LIN
Skegness		LIN
Worksop		LIN
Canterbury		MAI
Chatham		MAI
Dartford		MAI
Folkstone		MAI
Maidstone		MAI
Ravensbourne⊗		MAI
Sevenoaks		MAI
Tunbridge Wells		MAI
Wrexham		NWA
Douglas I-o-M		PRE
Southport		PRE
St Helens		PRE
Widnes		PRE
Buxton		SHR
Crewe		SHR
Glossop		SHR
Kidderminster		SHR
Ludlow		SHR
Oswestry		SHR
Shrewsbury		SHR
Warrington		SHR
Wellington		SHR
Whitchurch		SHR
Bridgend		SWA
Bridlington		YOR
Harrogate		YOR
Hull		YOR
Malton		YOR
Middlesborough		YOR
Scarborough		YOR
Whitby		YOR
York		YOR

The network of GPO / BT circuits comprising the carrier control area were allocated 'Private Wire' (PW) numbers in the series 103xxx where 'xxx' is the Carrier Control Area (CCA) number. For example, Swindon PW/SW 103031, Londonderry PW/NI 103290. The PW number is used for fault reporting and records purposes. In modern terminology a private wire is now known as a 'leased line' or 'private circuit'.