List of Royal Observer Corps / United Kingdom Warning and Monitoring Organisation Posts (L–P)
# List of Royal Observer Corps / United Kingdom Warning and Monitoring Organisation Posts (L–P)

This is a list of Royal Observer Corps (ROC) nuclear monitoring posts incorporated into the United Kingdom Warning and Monitoring Organisation (UKWMO).

* List of Royal Observer Corps / United Kingdom Warning and Monitoring Organisation Posts (A–E)
* List of Royal Observer Corps / United Kingdom Warning and Monitoring Organisation Posts (F–K)
* List of Royal Observer Corps / United Kingdom Warning and Monitoring Organisation Posts (L–P)
* List of Royal Observer Corps / United Kingdom Warning and Monitoring Organisation Posts (Q–Z)

Notes:-

* 1. Many of these underground bunkers still exist under private ownership, permission of the owner is paramount before attempting to locate them.
* 2. With a few exceptions the surviving bunkers are in varying states of dereliction and are unsafe.
* 3. Counties listed are contemporary which may differ from present counties.

List :

| Post Location | County | OS National Grid reference | 1st Opening | 1st Closing | 2nd Operating period |
| - | - | - | - | - | - |
| ROC Post Lairg | Sutherland | NC583060 | 1959 | 1991 | |
| ROC Post Lakenheath | Suffolk | TL72668261 | 1968 | 1991 | |
| ROC Post Lampeter Master Post | Cardiganshire | SN58214841 | 1959 | 1991 | |
| ROC Post Lamphey | Pembrokeshire | SN04160083 | 1960 | 1968 | |
| ROC Post Lancing | Sussex | TQ17160354 | 1962 | 1968 | |
| ROC Post Langham Master Post | Essex | TM00843050 | 1961 | 1991 | |
| ROC Post Langholm Master Post | Dumfriesshire | NY36568577 | 1961 | 1991 | |
| ROC Post Langport | Somerset | ST41742841 | 1958 | 1991 | |
| ROC Post Langtoft | Yorkshire | TA00466640 | 1959 | 1991 | |
| ROC Post Larne | Antrim | ID39580406 | 1961 | 1991 | |
| ROC Post Latchingdon | Essex | TL88260095 | 1960 | 1968 | |
| ROC Post Latheron | Caithness | ND20333342 | 1959 | 1991 | |
| ROC Post Lauder | Berwickshire | NT52584671 | 1963 | 1991 | |
| ROC Post Laugharne | Carmarthenshire | SN30020990 | 1963 | 1991 | |
| ROC Post Launceston | Cornwall | SX33468406 | 1961 | 1991 | |
| ROC Post Laurencekirk | Kincardineshire | NO713726 | 1959 | 1968 | |
| ROC Post Lavenham | Suffolk | TL91734863 | 1959 | 1968 | |
| ROC Post Lea | Herefordshire | SO67182203 | 1961 | 1991 | |
| ROC Post Leigh-on-Sea (L3) | Essex | TQ83518728 | 1966 | 1991 | |
| ROC Post Leighterton | Gloucestershire | ST82948937 | 1963 | 1991 | |
| ROC Post Lenham | Kent | TQ90185368 | 1962 | 1968 | |
| ROC Post Leominster Master Post | Herefordshire | SO51455772 | 1961 | 1991 | |
| ROC Post Lerwick | Shetland | HU44714237 | 1961 | 1991 | |
| ROC Post Leslie | Fife | NO250005 | 1963 | 1968 | |
| ROC Post Lesmahagow | Lanarkshire | NS79873835 | 1959 | 1968 | |
| ROC Post Letchworth | Hertfordshire | TL20153266 | 1960 | 1968 | |
| ROC Post Letham Master Post | Angus | NO52704985 | 1959 | 1991 | |
| ROC Post Letterston | Pembrokeshire | SM94902935 | 1960 | 1968 | |
| ROC Post Leven | Fife | NO38920169 | 1961 | 1968 | |
| ROC Post Lewes | Sussex | TQ39301126 | 1960 | 1991 | |
| ROC Post Lexden | Essex | TL97092257 | Unknown | 1968 | |
| ROC Post Leyburn | Yorkshire | SE11949145 | 1966 | 1968 | |
| ROC Post Liddesdale | Roxburghshire | NY47858797 | 1962 | 1968 | |
| ROC Post Lilliesleaf | Roxburghshire | NT52372756 | 1961 | 1968 | |
| ROC Post Limavady | Londonderry | IC68372193 | 1957 | 1991 | |
| ROC Post Lindholme | Yorkshire | SE69060757 | 1962 | 1991 | |
| ROC Post Linton, Cambridgeshire | Cambridgeshire | TL55394650 | 1961 | 1991 | |
| ROC Post Linton, Kent | Kent | TQ76405097 | 1962 | 1991 | |
| ROC Post Lintrathen | Angus | NO29145491 | 1957 | 1968 | |
| ROC Post Liskeard | Cornwall | SX25656467 | 1961 | 1991 | |
| ROC Post Lisnaskea | Fermanagh | IH36453422 | 1957 | 1991 | |
| ROC Post Little Waltham | Essex | TL71021338 | 1957 | 1975 | |
| ROC Post Little Sodbury Master Post | Gloucestershire | ST76658385 | 1960 | 1991 | |
| ROC Post Little Steeping | Lincolnshire | TF42566183 | 1962 | 1991 | |
| ROC Post Littleport | Cambridgeshire | TL56388524 | 1960 | 1968 | |
| ROC Post Littlehampton | Sussex | SU99590327 | 1960 | 1991 | |
| ROC Post Llananno | Radnorshire | SO09697448 | 1960 | 1991 | |
| ROC Post Llanbedr | Merionethshire | SH58552612 | 1960 | 1991 | |
| ROC Post Llanboidy | Carmarthenshire | SN20612323 | 1960 | 1991 | |
| ROC Post Llanbrynmair | Montgomeryshire | SH90060287 | 1961 | 1968 | |
| ROC Post Llandovery | Carmarthenshire | SN76573534 | 1961 | 1991 | |
| ROC Post Llandrindod Wells | Radnorshire | SO06026027 | 1958 | 1991 | |
| ROC Post Llandudno | Caernarvonshire | SH77588137 | 1961 | 1991 | |
| ROC Post Llandysul | Cardiganshire | SN39254315 | 1960 | 1968 | |
| ROC Post Llanfaethlu Master Post | Anglesey | SH31138693 | 1959 | 1981 | |
| ROC Post Llanfair Caereinion | Montgomeryshire | SJ10180624 | 1961 | 1968 | |
| ROC Post Llanfair Talhaiarn | Denbighshire | SH92936999 | 1960 | 1991 | |
| ROC Post Llanfairfechan | Caernarvonshire | SH677742 | 1960 | 1968 | |
| ROC Post Llanfyllin | Montgomeryshire | SJ14622018 | 1965 | 1968 | |
| ROC Post Llangadfan | Montgomeryshire | SJ01991161 | 1962 | 1968 | |
| ROC Post Llangammarch Wells | Breconshire | SN92834759 | 1958 | 1991 | |
| ROC Post Llangefni | Anglesey | SH45627658 | 1960 | 1981 | |
| ROC Post Llangollen Master Post | Denbighshire | SJ21534277 | 1958 | 1991 | |
| ROC Post Llanidloes | Montgomeryshire | SN947857 | 1960 | 1991 | |
| ROC Post Llanishen | Glamorganshire | ST18988508 | 1966 | 1991 | |
| ROC Post Llanon | Cardiganshire | SN51746680 | 1959 | 1991 | |
| ROC Post Llanrhaeadr-yng-Nghinmeirch | Denbighshire | SJ13112608 | 1965 | 1991 | |
| ROC Post Llanrwst | Denbighshire | SH808624 | 1960 | 1968 | |
| ROC Post Llantilio Crossenny | Monmouthshire | SO40411410 | 1961 | 1991 | |
| ROC Post Llantwit Major | Glamorganshire | SS97346922 | 1960 | 1968 | |
| ROC Post Llanuwchllyn | Merionethshire | SH87842936 | 1960 | 1968 | 1981-1991 |
| ROC Post Llanwyddyn | Montgomeryshire | SJ02601869 | 1962 | 1991 | |
| ROC Post Llanymynech | Montgomeryshire | SJ26452130 | 1960 | 1991 | |
| ROC Post Llysfaen | Denbighshire | SH88877736 | 1962 | 1968 | |
| ROC Post Lochaline Master Post | Argyllshire | NM67444517 | 1963 | 1991 | |
| ROC Post Lochboisdale | Inverness-shire | NF77092028 | 1963 | 1991 | |
| ROC Post Lochcarron | Ross & Cromarty | NG94724450 | Unknown | 1991 | |
| ROC Post Lochearnhead | Perthshire | NN60322231 (probable) | Unknown | 1968 | |
| ROC Post Lochgilphead Master Post | Argyllshire | NR84988593 | 1960 | 1991 | |
| ROC Post Lochmaddy | Inverness-shire | NF91376893 | 1963 | 1991 | |
| ROC Post Lockerbie | Dumfriesshire | MY144816 | 1964 | 1968 | |
| ROC Post Lockerley | Hampshire | SU31272494 | 1966 | Ca1975 to 1983 | |
| ROC Post Lockton | Yorkshire | SE84238924 | 1961 | 1968 | |
| ROC Post Loddon | Norfolk | TM36969825 | 1961 | 1968 | |
| ROC Post Loftus | Yorkshire | NZ72091980 | 1962 | 1968 | |
| ROC Post Derry | Londonderry | IC39981742 | 1957 | 1991 | |
| ROC Post Long Ashton | Somerset | ST53916937 | 1960 | 1968 | |
| ROC Post Long Compton | Warwickshire | SP29643097 | 1961 | 1991 | |
| ROC Post Long Stratton | Norfolk | TM20239208 | 1959 | 1968 | |
| ROC Post Long Sutton | Lincolnshire | TF44402553 | 1962 | 1968 | |
| ROC Post Longformacus | Berwickshire | NT686580 | 1963 | 1968 | |
| ROC Post Longhorsley | Northumberland | NZ14189432 | 1960 | 1991 | |
| ROC Post Longhoughton | Northumberland | NU25881553 | 1962 | 1968 | |
| ROC Post Longparish | Hampshire | SU43594346 | 1961 | 1968 | |
| ROC Post Longridge | Lancashire | SD62133883 | 1960 | 1991 | |
| ROC Post Longton, Lancashire | Lancashire | SD47622605 | Unknown | 1968 | |
| ROC Post Longton, Staffordshire | Staffordshire | SJ930445 | 1965 | 1968 | |
| ROC Post Longworth | Berkshire | SU41229962 | 1959 | 1968 | |
| ROC Post Louth | Lincolnshire | TF33738474 | 1959 | 1991 | |
| ROC Post Lowestoft | Suffolk | TM54659588 | 1959 | 1991 | |
| ROC Post Ludlow | Shropshire | SO50407436 | 1961 | 1991 | |
| ROC Post Lurgan | Armagh | IJ096597 | 1957 | Before 1991 | |
| ROC Post Lutterworth | Leicestershire | SP52038559 | 1963 | 1991 | |
| ROC Post Lydbury North | Shropshire | SO36018596 | 1965 | 1991 | |
| ROC Post Lydeard St. Lawrence | Somerset | ST12433133 | 1961 | 1968 | |
| ROC Post Lydford | Devonshire | SX52738557 | 1960 | 1991 | |
| ROC Post Lyminge | Kent | TR16754080 | 1960 | 1968 | |
| ROC Post Lyndhurst | Hampshire | SU28870884 | 1962 | 1991 | |
| ROC Post Lynton Master Post | Devonshire | SS72654821 | 1961 | 1991 | |
| ROC Post Lyonshall | Herefordshire | SO32525638 | 1963 | 1991 | |
| ROC Post Lytham | Lancashire | SD 33622739 | 1963 | 1991 | |
| ROC Post Mablethorpe | Lincolnshire | TF50308633 | 1961 | 1991 | |
| ROC Post Macclesfield | Cheshire | SJ92497256 | 1965 | 1968 | |
| ROC Post Macduff | Banffshire | NJ708644 | 1959 | 1991 | |
| ROC Post Machrihanish Master Post | Argyllshire | NR66822247 | 1963 | 1991 | |
| ROC Post Machynlleth | Montgomeryshire | SH74120077 | 1961 | 1991 | |
| ROC Post Madron Master Post | Cornwall | SW43833354 | 1962 | 1991 | |
| ROC Post Maenclochog | Pembrokeshire | SN07082788 | 1960 | 1991 | |
| ROC Post Maesteg | Glamorganshire | SS84679074 | 1961 | 1991 | |
| ROC Post Malborough | Devonshire | SX709407 | 1959 | 1968 | |
| ROC Post Maldon | Essex | TL83740710 | 1960 | 1968 | |
| ROC Post Mallaig | Inverness-shire | NM675954 | 1963 | 1991 | |
| ROC Post Malmesbury | Wiltshire | ST95448547 | 1962 | 1968 | |
| ROC Post Malpas | Cheshire | SJ49454795 | 1962 | 1991 | |
| ROC Post Malton | Yorkshire | SE7822672252 | 1961 | 1968 | |
| ROC Post Manaton | Devonshire | SX764782 | Not opened | | |
| ROC Post Manea | Cambridgeshire | TL47408890 | 1961 | 1968 | |
| ROC Post Manningtree | Essex | TM10153167 | 1960 | 1968 | |
| ROC Post Marazion | Cornwall | SW54023029 (Approx) | 1958 | 1968 | |
| ROC Post March | Cambridgeshire | TL40469495 | 1961 | 1991 | |
| ROC Post Marchwood | Hampshire | SU39220864 | 1962 | 1968 | |
| ROC Post Marianglas Master Post | Anglesey | SH50148395 | 1960 | 1968 | 1981-1991 |
| ROC Post Market Deeping | Lincolnshire | TF14170827 | 1960 | 1991 | |
| ROC Post Market Drayton | Shropshire | SJ66023462 | 1965 | 1991 | |
| ROC Post Market Rasen | Lincolnshire | TF09058771 | 1962 | 1991 | |
| ROC Post Market Weighton | Yorkshire | SE91094162 | 1960 | 1968 | |
| ROC Post Markfield | Leicestershire | SK48601080 | 1966 | 1968 | |
| ROC Post Markyate | Hertfordshire | TL05741562 | 1960 | 1991 | |
| ROC Post Marlow | Buckinghamshire | SU85388695 | 1960 | 1968 | |
| ROC Post Marshfield | Gloucestershire | ST77267294 | 1958 | 1991 | |
| ROC Post Marston Magna | Somerset | ST59022548 | 1962 | 1991 | |
| ROC Post Martham | Norfolk | TG42841666 | 1958 | 1968 | |
| ROC Post Medstead | Hampshire | SU66373650 | 1963 | 1968 | |
| ROC Post Meikleour | Perthshire | NO16523913 | 1958 | 1968 | |
| ROC Post Melbourne | Derbyshire | SK36492497 | 1961 | 1968 | 1975-1991 |
| ROC Post Mellor | Lancashire | SD65723132 | 1959 | 1968 | |
| ROC Post Melton Constable | Norfolk | TF04123778 | 1958 | 1991 | |
| ROC Post Melton Mowbray | Leicestershire | SK74202169 | 1959 | 1968 | |
| ROC Post Melvich | Sutherland | NC875655 | 1959 | 1991 | |
| ROC Post Mere | Wiltshire | ST80283506 | 1965 | 1991 | |
| ROC Post Meriden | Warwickshire | SP26178245 | 1965 | 1991 | |
| ROC Post Merthyr Tydfil | Glamorganshire | SO02810697 | 1959 | 1991 | |
| ROC Post Methlick Master Post | Aberdeenshire | NJ87033778 | 1961 | 1991 | |
| ROC Post Methven | Perthshire | NO01592652 | 1964 | 1991 | |
| ROC Post Mevagissey | Cornwall | SX00684232 | 1958 | 1991 | |
| ROC Post Middlesmoor | Yorkshire | SE08557534 | 1959 | 1991 | |
| ROC Post Middleton | Norfolk | TF67341598 | 1960 | 1968 | 1989-1991 |
| ROC Post Middleton on the Wolds | Yorkshire | SE94125045 | 1960 | 1968 | |
| ROC Post Middleton Stoney | Oxfordshire | SP54182374 | 1959 | 1991 | |
| ROC Post Middlewich | Cheshire | SJ70856629 | 1965 | 1991 | |
| ROC Post Midhurst | Sussex | SU86571962 | 1960 | 1968 | |
| ROC Post Milford | Surrey | SU94704310 | 1960 | 1968 | |
| ROC Post Millbrook Master Post | Cornwall | SX43255152 | 1960 | 1991 | |
| ROC Post Milfield | Northumberland | NT93043457 | 1960 | 1991 | |
| ROC Post Millom | Cumberland | SD17687908 | 1964 | 1968 | |
| ROC Post Milnathort | Kinross-shire | NO09690383 | 1960 | 1991 | |
| ROC Post Milngavie | Dunbartonshire | NS553757 | 1961 | 1968 | |
| ROC Post Milnthorpe | Westmorland | SD48508050 | 1965 | 1968 | |
| ROC Post Minard | Argyllshire | NR97599658 | 1960 | 1991 | |
| ROC Post Minehead | Somerset | SS94284741 (Possible) | 1961 | 1968 | |
| ROC Post Minster | Kent | TR31546568 | 1962 | 1991 | |
| ROC Post Minsterley | Shropshire | SJ37190538 | 65 | 1991 | |
| ROC Post Mitchell | Cornwall | SW84175368 | 1963 | 1991 | |
| ROC Post Modbury Master Post | Devonshire | SX67665468 | 1959 | 1991 | |
| ROC Post Mold | Flintshire | SJ24336191 | 1964 | 1968 | |
| ROC Post Moniaive | Dumfriesshire | NX76969018 | 1962 | 1975 | |
| ROC Post Montgomery | Montgomeryshire | SO21939660 | 1960 | 1968 | |
| ROC Post Morebattle | Roxburghshire | NT77752480 | 1961 | 1991 | |
| ROC Post Moretonhampstead | Devonshire | SX74128454 | 1959 | 1968 | |
| ROC Post Mortlake | Surrey | TQ21117476 | 1966 | 1968 | |
| ROC Post Moulton Chapel | Lincolnshire | TF32271772 | 1960 | 1968 | |
| ROC Post Mountain Ash | Glamorganshire | ST05479669 | 1961 | 1991 | |
| ROC Post Much Hadham | Hertfordshire | TL43591995 | 1962 | 1991 | |
| ROC Post Much Wenlock | Shropshire | SO61399859 | 1961 | 1991 | |
| ROC Post Muckhart | Perthshire | NO00740158 | 1960 | 1968 | |
| ROC Post Muirkirk Master Post | Ayrshire | NS69292800 | 1959 | 1991 | |
| ROC Post Mundesley | Norfolk | TG30173672 | 1960 | 1991 | |
| ROC Post Mundford | Norfolk | TL80669516 | 1961 | 1991 | |
| ROC Post Nairn | Nairn | NH898568 | 1961 | 1968 | |
| ROC Post Nanpean | Cornwall | SW9745399 | 1959 | 1968 | |
| ROC Post Nantglyn | Denbighshire | SJ00516299 | 1966 | 1968 | |
| ROC Post Napton-on-the-Hill | Warwickshire | SP45926137 | 1959 | 1968 | |
| ROC Post Narberth | Pembrokeshire | SN11121240 | 1960 | 1991 | |
| ROC Post Narborough | Norfolk | TF74100728 | 1959 | 1991 | |
| ROC Post Navenby | Lincolnshire | SK98345473 | 1958 | 1991 | |
| ROC Post Nazeing | Essex | TL42250622 | 1960 | 1968 | |
| ROC Post Nefyn | Caernarvonshire | SH27844074 | 1960 | 1991 | |
| ROC Post Nesscliffe | Shropshire | SJ38851869 | 1965 | 1991 | |
| ROC Post Neston | Cheshire | SJ31487962 | 1963 | 1991 | |
| ROC Post New Buckenham | Norfolk | TM09639073 | 1960 | 1968 | |
| ROC Post New Cumnock | Ayrshire | NS61671342 | 1964 | 1991 | |
| ROC Post New Deer | Aberdeenshire | NJ88554656 | 1958 | 1968 | |
| ROC Post New Luce | Wigtownshire | NX17746608 | 1959 | 1991 | |
| ROC Post New Malden | Surrey | TQ21226967 | 1963 | 1968 | |
| ROC Post New Mills / New Oakley | Fife | NT02778983 | 1965 | Before 1977 | |
| ROC Post New Milton | Hampshire | SZ23319306 | 1960 | 1968 | |
| ROC Post New Radnor | Radnorshire | SO21736083 | 1962 | 1991 | |
| ROC Post Newark-on-Trent | Nottinghamshire | SK75555714 | 1963 | 1991 | |
| ROC Post Newbigging Master Post | Angus | NO51253767 | 1961 | 1991 | |
| ROC Post Newborough | Anglesey | SH41836532 | 1960 | 1991 | |
| ROC Post Newburgh, Aberdeenshire | Aberdeenshire | NJ99532524 | 1961 | 1968 | |
| ROC Post Newburgh, Fife | Fife | NO24201844 | 1961 | 1991 | |
| ROC Post Newbury | Berkshire | SU45146514 | 1958 | 1991 | |
| ROC Post Newcastle Emlyn Master Post | Cardiganshire | SN31014182 | 1958 | 1991 | |
| ROC Post Newhaven | Sussex | TQ44430005 | 1965 | 1968 | |
| ROC Post Newick | Sussex | TQ41962271 | 1965 | 1968 | |
| ROC Post Newport, Monmouthshire | Monmouthshire | ST28879023 | 1962 | 1991 | |
| ROC Post Newport, Pembrokeshire | Pembrokeshire | SN04403899 | 1960 | 1968 | |
| ROC Post Newport, Hampshire - 1 | Hampshire | SZ496878 | 1961 | 1961 | |
| ROC Post Newport, Hampshire - 2 | Hampshire | SZ51838910 | 1962 | 1991 | |
| ROC Post New Quay | Cardiganshire | SN38296010 | 1959 | 1991 | |
| ROC Post Newquay | Cornwall | SW84966384 | 1961 | 1968 | |
| ROC Post Newton Abbot | Devonshire | SX84346911 | 1962 | 1968 | |
| ROC Post Newton Stewart | Wigtownshire | NX40406537 | 1963 | 1968 | |
| ROC Post Newtown | Montgomeryshire | SO11429225 | 1961 | 1991 | |
| ROC Post Newtownards | Down | IJ45917489 | 1961 | 1968 | |
| ROC Post Newtownstewart | Tyrone | IH40318715 | 1957 | 1991 | |
| ROC Post Newtyle | Angus | NO285417 | 1963 | 1958 | |
| ROC Post Ninfield | Sussex | TQ69981278 | 1962 | 1991 | |
| ROC Post Niton IOW | Hampshire | SZ50757612 | 1962 | 1991 | |
| ROC Post Norham-on-Tweed | Northumberland | NT90684626 | 1960 | 1991 | |
| ROC Post North Berwick | Lothian (East) | NT56108432 | 1959 | 1991 | |
| ROC Post North Cerney | Gloucestershire | SP02990822 | 1962 | 1991 | |
| ROC Post North Kelsey | Lincolnshire | TA05390130 | 1959 | 1991 | |
| ROC Post North Somercotes | Lincolnshire | TF44749468 | 1964 | 1968 | |
| ROC Post North Stainley | Yorkshire | SE27037636 | 1959 | 1991 | |
| ROC Post North Walsham | Norfolk | TG24513253 | 1957 | 1968 | |
| ROC Post Northallerton | Yorkshire | SE384912 | 1961 | 1991 | |
| ROC Post Northiam | Sussex | TQ82482537 | 1961 | 1991 | |
| ROC Post Northleach | Gloucestershire | SP09641467 | 1962 | 1968 | |
| ROC Post Northolt | London & Middlesex | TQ09388505 | 1967 | 1991 | |
| ROC Post Northwich | Cheshire | SJ67287225 | 1965 | 1968 | |
| ROC Post Oakengates | Shropshire | SJ69351014 | 1961 | 1991 | |
| ROC Post Oare | Kent | TR00196282 | 1961 | 1968 | |
| ROC Post Oban | Argyllshire | NM907356 | 1960 | 1968 | |
| ROC Post Odiham | Hampshire | SU744491 | 1961 | 1968 | |
| ROC Post Offley | Hertfordshire | TL13582711 | 1959 | 1991 | |
| ROC Post Ogbourne St George | Wiltshire | SU215756 | 1961 | 1968 | |
| ROC Post Okehampton | Devonshire | SX53939398 | 1962 | 1968 | |
| ROC Post Old Leake | Lincolnshire | TF44804887 | 1963 | 1968 | |
| ROC Post Olney Master Post | Buckinghamshire | SP89154570 | 1964 | 1991 | |
| ROC Post Omagh | Tyrone | IH46767423 | Unknown | 1968 | |
| ROC Post Ombersley | Worcestershire | SO84746364 | 1961 | 1991 | |
| ROC Post Onich | Inverness-shire | NN02556145 | 1963 | 1991 | |
| ROC Post Orford | Suffolk | TM41064928 | 1961 | 1968 | |
| ROC Post Orsett | Essex | TQ64408115 | 1959 | 1968 | |
| ROC Post Osmotherley | Yorkshire | SE455977 | 1959 | 1968 | |
| ROC Post Oswestry | Shropshire | SJ29672989 | 1961 | 1968 | |
| ROC Post Otterburn | Northumberland | NY90949504 | 1963 | 1991 | |
| ROC Post Otterham | Cornwall | SX14758845 | 1962 | 1991 | |
| ROC Post Oundle | Northamptonshire | TL08708616 | 1964 | 1968 | |
| ROC Post Out Newton | Yorkshire | TA36952430 | 1965 | 1968 | |
| ROC Post Overton, Flintshire | Flintshire | SJ37374414 | 1965 | 1991 | |
| ROC Post Overton, Hampshire | Hampshire | SU52074977 | 1960 | 1991 | |
| ROC Post Oxshott | Surrey | TQ14636230 | 1962 | 1968 | |
| ROC Post Oxton Master Post | Berwickshire | NT47745761 | 1963 | 1991 | |
| ROC Post Padiham Master Post | Lancashire | SD79603461 | 1963 | 1991 | |
| ROC Post Pagham | Sussex | SU89410034 | 1963 | 1968 | |
| ROC Post Paignton | Devonshire | SX84666089 | 1963 | 1968 | |
| ROC Post Pakefield | Suffolk | TM53578813 | 1957 | 1968 | |
| ROC Post Par | Cornwall | SX10305554 | 1961 | 1991 | |
| ROC Post Parbold | Lancashire | SD52751251 | 1962 | 1968 | |
| ROC Post Parkgate | Dumfriesshire | NY04569090 | 1964 | 1991 | |
| ROC Post Park Street Master Post | Hertfordshire | TL15390420 | 1961 | 1968 | |
| ROC Post Parson Drove | Cambridgeshire | TF37920964 | 1960 | 1991 | |
| ROC Post Parton | Kirkcudbrightshire | NX68867036 | 1960 | 1991 | |
| ROC Post Pattingham | Shropshire | SO81789705 | 1963 | 1991 | |
| ROC Post Pavenham | Bedfordshire | SP97145557 | 1964 | 1991 | |
| ROC Post Peacehaven | Sussex | TQ41430062 | Not underground | Not underground | |
| ROC Post Peat Inn | Fife | NO45990979 | 1960 | 1968 | |
| ROC Post Peebles | Peebles-shire | NT24544102 | 1959 | 1991 | |
| ROC Post Peel | Isle of Man | SC25648470 | 1968 | 1991 | |
| ROC Post Pen-y-Groes | Caernarvonshire | SH47535343 | 1964 | 1991 | |
| ROC Post Penarth | Glamorganshire | ST18586903 | 1962 | 1975 | |
| ROC Post Pencader | Carmarthenshire | SN45133706 | 1961 | 1991 | |
| ROC Post Penclawdd | Glamorganshire | SS53939537 | 1960 | 1991 | |
| ROC Post Pencoed | Glamorganshire | SS96307913 | 1961 | 1991 | |
| ROC Post Pencombe Master Post | Herefordshire | S061795314 | 1961 | 1991 | |
| ROC Post Penhow | Monmouthshire | ST41409038 | 1961 | 1991 | |
| ROC Post Penicuik | Lothian (Mid) | NT23405763 | 1961 | 1991 | |
| ROC Post Penmachno | Caernarvonshire | SH79345056 | 1963 | 1968 | |
| ROC Post Penmaen | Glamorganshire | SS53788852 | 1966 | 1968 | |
| ROC Post Penrith Master Post | Cumberland | NY50412911 | 1960 | 1991 | |
| ROC Post Penryn Master Post | Cornwall | SW75863530 | 1958 | 1991 | |
| ROC Post Penshurst | Kent | TQ52614705 | 1965 | 1991 | |
| ROC Post Pentrefoelas | Denbighshire | SH87075108 | 1958 | 1991 | |
| ROC Post Pentyrch | Glamorganshire | ST09948245 | 1961 | 1968 | |
| ROC Post Penyffordd | Flintshire | SJ30916217 | 1958 | 1968 | |
| ROC Post Pershore | Worcestershire | SO94004653 | 1961 | 1968 | |
| ROC Post Peterchurch Master Post | Herefordshire | SO36213934 | 1961 | 1991 | |
| ROC Post Petworth | Sussex | SU95981592 | 1966 | 1968 | |
| ROC Post Pevensey | Sussex | TQ64580275 | 1962 | 1991 | |
| ROC Post Pickering | Yorkshire | SE79298444 | 1961 | 1991 | |
| ROC Post Piercebridge | Durham | NZ23321525 | 1960 | 1968 | |
| ROC Post Pinhoe Master Post | Devonshire | SX99689326 | 1962 | 1991 | |
| ROC Post Pit House | Durham | NZ201399 | 1959 | 1968 | |
| ROC Post Pitcaple | Aberdeenshire | NJ71812600 | 1961 | 1991 | |
| ROC Post Pleasley Hill | Nottinghamshire | SK50856443 | 1961 | 1968 | |
| ROC Post Pluckley | Kent | TQ92174593 | 1961 | 1991 | |
| ROC Post Plympton | Devonshire | SX53095781 | 1958 | 1968 | |
| ROC Post Plymstock | Devonshire | SX49945178 | 1964 | 1991 | |
| ROC Post Pocklington | Yorkshire | SE84235080 | 1960 | 1991 | |
| ROC Post Polesworth | Staffordshire | SK244022 | 1962 | 1983 | |
| ROC Post Polperro | Cornwall | SX20985492 | 1960 | 1968 | |
| ROC Post Pomeroy | Tyrone | IH70307178 | Unknown | 1968 | |
| ROC Post Pontardulais | Glamorganshire | SN58130435 | 1962 | 1968 | |
| ROC Post Ponteland | Northumberland | NZ15606954 | 1962 | 1991 | |
| ROC Post Ponterwyd | Cardiganshire | SN75228203 | 1963 | 1991 | |
| ROC Post Pontrilas | Herefordshire | S0 38772692 | 1961 | 1991 | |
| ROC Post Pontypool | Monmouthshire | SO29370063 | 1961 | 1975 | |
| ROC Post Pontypridd | Glamorganshire | ST06728873 | 1960 | 1968 | |
| ROC Post Port Ellen | Argyllshire | NR 32395173 | 1965 | 1991 | |
| ROC Post Port William | Wigtownshire | NX34274301 | 1961 | 1968 | before 1987-1991 |
| ROC Post Portadown Master Post | Armagh | IH96565760 | 1960 | 1968 | |
| ROC Post Portaferry | Down | IJ60034918 | 1958 | 1968 | |
| ROC Post Porthcawl | Glamorganshire | SS80807747 | 1961 | 1991 | |
| ROC Post Portishead | Somerset | ST44837585 | 1964 | 1968 | |
| ROC Post Portland Bill | Dorsetshire | SY68087119 | 1960 | 1991 | |
| ROC Post Portlethen | Kincardineshire | NO92419615 | 1961 | 1991 | |
| ROC Post Portmadoc | Caernarvonshire | SH55993726 | 1960 | 1968 | |
| ROC Post Portobello | Mid Lothian | NT305705 | 1962 | 1968 | |
| ROC Post Portpatrick | Wigtownshire | NX00465378 | 1957 | 1968 | |
| ROC Post Portree | Isle of Skye | NG47204481 | 1966 | 1991 | |
| ROC Post Portsoy | Banffshire | NJ60696611 | 1960 | 1968 | |
| ROC Post Poulton | Gloucestershire | SP10050202 | 1962 | 1968 | |
| ROC Post Powick | Worcestershire | SO82775194 | 1962 | 1991 | |
| ROC Post Powrie Brae | Angus | NO42383489 | 1957 | 1968 | |
| ROC Post Poynton | Cheshire | SJ93208262 | 1962 | 1991 | |
| ROC Post Praze-An-Beeble | Cornwall | SW67323665 | 1961 | 1968 | |
| ROC Post Prees | Shropshire | SJ560331 | 1965 | 1968 | |
| ROC Post Prestatyn | Flintshire | SJ07918186 | 1961 | 1991 | |
| ROC Post Preston | Dorsetshire | SY70868190 | 1961 | 1968 | |
| ROC Post Preston on the Hill | Cheshire | SJ571819 | 1965 | 1968 | |
| ROC Post Prestwich | Lancashire | SD83230475 | 1958 | 1991 | |
| ROC Post Prestwick | Ayrshire | NS344251 | 1957 | 1958 | |
| ROC Post Princes Risborough | Buckinghamshire | SP80200170 | 1964 | 1968 | |
| ROC Post Prudhoe | Northumberland | NZ09186233 | 1962 | 1991 | |
| ROC Post Pulborough | Sussex | TQ06431952 | 1968 | 1991 | |
| ROC Post Puriton | Somerset | ST29144307 | 1963 | 1968 | |
