HOME OFFICE CALLSIGN DIRECTORY M2A- South West Scotland M2AF Dumfries & Galloway Fire M2AH Central Region Police M2AJ Dumfries & Galloway Police M2AS Strathclyde Police M2AW Scottish Crime Squad M2AYF Central Region Fire M2B- North West Region M2BA Cheshire Police M2BB Cumbria Police M2BC Cumbria Fire M2BD Lancashire Police M2BE Lancashire Fire M2BF Lancashire Police (Mobile Base) M2BG Lancashire Police (Mobiles to Mobile Base) M2BM HMP (Y) Hewell Grange M2BN HMP Send M2BO HMP (Y) Thorn Cross M2BV HMP (Y) Guys Marsh M2BX British Transport Police M2CA North West Regional Crime Squad M2CB North East Regional Crime Squad M2CC Midland Regional Crime Squad M2CD South West Regional Crime Squad M2CE South East Regional Crime Squad M2CF Cheshire Fire M2CH Merseyside Police M2CK Greater Manchester Police M2CP City of London Police M2CR Regional Crime Squad National Training Centre Ripley M2CS Scottish Home Office Incident Vehicle M2CT Scottish Home Office Prisoner Vehicle M2CW South & Mid Wales Regional Crime Suad M2CX Customs & Excise M2DF Dishforth Police Training Centre M2DG Dorking Fire Service College M2DM HMP Durham M2DW Prisons Direcorate of Works M2ED Bomb Disposal M2EM Solo Electronics M2EP Birmingham Airport Police M2F- Metropolitan Counties fire M2FB West Midlands Fire M2FE London Fire Ch.3 M2FH London Fire Ch.1 M2FL HMP Full Sutton M2FN London Fire Ch.4 M2FO Merseyside Fire M2FS London Fire Ch.2 M2FT Greater Manchester Fire M2GA Jersey Fire M2GB Alderney Police M2GC Scilly Isles M2GF Guernsey Fire M2GP Gatwick Airport Police M2GT Metropolitan Police Major Incident/Special Events/Major Public Disorder M2GW Police Scientific Research Department M2GWD Police Research Department M2GX Strathclyde Fire M2GY Guernsey Police M2GZ HMP Guernsey M2H- Home Counties region M2HA Thames Valley (Oxfordshire / Buckinghamshire) M2HB Thames Valley Police (Oxon, Bucks, Berks) M2HC Hampshire Police (County) M2HD Berkshire Fire M2HE Hampshire Police (Aviation) M2HF Surrey Fire M2HG HMP Haverrigg M2HI Oxfordshire Fire M2HJ Surrey Police M2HK Buckinghamshire Fire M2HL Hampshire Police (Ch 05) M2HM HMP Bullingdon M2HO Hampshire Police (North) M2HP Isle of Wight Fire M2HS Hampshire Police (Southeast) M2HU was Thames Valley (Berkshire) - no longer used M2HT was Thames Valley (PNC South) - no longer used M2HW Hampshire Police (Ch 04) M2HX Hampshire Fire M2HY was Thames Valley (PNC North) - no longer used M2IA Liverpool Immigration Branch M2IB Birmingham Immigration Branch M2IC Felixstowe Immigration Branch M2ID1 Dover East Immigration Branch M2ID2 Dover West Immigration Branch M2IE Sheerness Immigration Branch M2IG Gravesend Immigration Branch M2IH Heathrow Immigration Branch M2II Portsmouth Immigration Branch M2IJ Newhaven Port Immigration Branch M2IK Falmouth Immigration Branch M2IL HM Inspector of Constabulary, Northern Region M2IM HM Inspector of Constabulary, South East Region M2IN HM Inspector of Constabulary, Eastern Region M2IO HM Inspector of Constabulary, Staff College M2IP HM Inspector of Constabulary, North/Mid-West Region M2IQ Harmondsworth Immigration Branch M2IR Manchester Immigration Branch M2IS Southampton Immigration Branch M2IT Leeds Immigration Branch M2IU Gatwick Immigration Branch M2IV Stansted Immigration Branch M2IW HM Inspector of Constabulary, Wales and South West Region M2IX HM Inspector of Constabulary, South West Region M2IY HM Inspector of Constabulary, Midland Region M2JA HMP Ashwell M2JB HMP Lincoln M2JC HMP Ashford M2JD HMP Drake Hall M2JE HMP Coldingley M2JF HMP Stafford M2JG HMP Winson Green, Birmingham M2JH HMP Holloway M2JI HMP Cookham Wood M2JJ HMP (R) Low Newton M2JK HMP Wakefield M2JL HMP Leeds M2JM HMP (Y) Erlestoke M2JN HMP (Y) Swinfen Hall M2JO HMP (Y) Onley Near Rugby M2JP HMP Pentonville M2JQ HMP Sudbury M2JR HMP Wymott M2JS HMP Wormwood Scrubs M2JT HMP Thorpe Arch M2JU HMP Hull M2JV HMP Acklington M2JW HMP Wandsworth M2JX HMP Brixton M2JY HMP Shrewsbury M2JZ HMP Long Lartin M2K- South East region M2KA Kent Police M2KB Sussex Police M2KD East Sussex Fire M2KE HMP Elmley M2KF Kent Fire M2KG Prison Service, Garth M2KH HMP Bullwood Hall M2KI HMP Banstead M2KL Littlehey Cat.C prison, St.Neots, Cambs. M2KM Prison Service, Mount M2KN HMP (R) New Hall M2KR Ramsgate Immigration Branch M2KS Prison Service, Swaleside M2KW West Sussex Fire M2L- North East region M2LA Durham Police M2LB Northumbria Police M2LD Liverpool Docks Immigration Branch M2LF Durham Fire M2LJ Northumberland Fire M2LP Tyne & Wear Fire M2LT Cleveland Fire M2LV Liverpool Airport Fire M2LW Prison Service College, Wakefield M2LY North Yorkshire Fire M2LZ Cleveland Police M2MA West Midlands Police (Traffic) M2MB HMP Belmarsh M2MD Special Use Undislosed[Heard On 451.700/465.600 From North London] M2MN Isle of Man Fire M2MP Metropolitan Police M2MS West Midlands Police Motor Show Only M2MT Royal Mint M2MX Isle of Man Police M2MY London Fire Salvage Corps M2MZ North Yorkshire Mountain Rescue M2N- East Midlands region M2NA Derbyshire Police M2NB HMP Moreton Hall M2NC Lincolnshire Police M2ND Derbyshire Fire M2NE HMP Frankland M2NF HMP (Y) Everthorpe M2NG Northamptonshire Police M2NH Nottinghamshire Police M2NI HMP (Y) Huntercombe M2NJ HMP Featherston M2NK Leicestershire Fire M2NL Leicestershire Police M2NM HMP (Y) Northallerton M2NN HMP The Verne M2NO Northamptonshire Fire M2NP Prison Service College, Wakefield M2NQ HMP (Y) Wellingborough M2NR HMP East Sutton Park M2NS HMP (Y) Feltham M2NT HMP Highpoint M2NU HMP (Y) Castleton M2NV Lincolnshire Fire M3NW North Sea Camp Borstall M2NX HMP (Y) Glen Parva M2NY HMP Bristol M2NZ Nottinghamshire Fire M2OA HMP Reading M2OB HMP Styal M2OC HMP Portland M2OD HMP Dartmoor M2OE HMP Exeter M2OF HMP (Y) Hatfield M2OG HMP Gartree M2OH HMP (Y) Hindley M2OG HMP Gartree M2OI HMP Leyhill M2OJ HMP Leicester M2OK HMP Kirkham M2OL HMP Lancaster M2OM HMP Shepton Mallett M2ON HMP Nottingham M2OO HMP (Y) Portland M2OP HMP Preston M2OQ HMP Gloucester M2OR HMP (R) Risely M2OS HMP Strangeways M2OT HMP Dorchester M2OU HMP Leicester M2OV Moss Side Prison Service Hospital M2OW Prison Service, Walton M2OX Rampton Prison Service Hospital M2OY HMP Ranby M2OZ HMP (R) Latchmere House M2PA HMP (Y) Aylesbury M2PB HMP Grendon/Spring Hill M2PC HMP Oxford M2PD Broadmoor Prison Service Hospital M2PE HMP Standford Hill M2PF HMP Ford M2PG HMP Chelmsford M2PH HMP (D) Holleslay Bay M2PI HMP Bedford M2PJ HMP Camp Hill M2PK HMP Canterbury M2PL Port of London Authority M2PM HMP Maidstone M2PN HMP Blundeston M2PO HMP Norwich M2PP HMP Cardiff M2PR HMP (R) Rochester M2PQ HMP Swansea M2PS HMP Lewes M2PT HMP Parkhurst M2PU HMP Winchester M2PV HMP (Y) Dover M2PW HMP Northeye M2PX HMP (Y) Deerbolt M2PY HMP Albany M2PZ HMP Kingston M2Q- South West region M2QA Cornwall Fire M2QB Devon & Cornwall Police M2QC Dorset Police M2QD Devon Fire M2QE Prison Service Regional Command Vehicle M2QF Gloucestershire Fire M2QG Avon Fire M2QI Somerset Fire M2QJ Wiltshire Police M2QK Dorset Fire M2QL Gloucestershire Police M2QM Wiltshire Fire M2QP Avon & Somerset Police M2QR HMP Channings Wood M2QS HMP Aldington M2QT Prison Service, Blantyre House M2QW Devon Fire M2QY Guernsey ? > > M2R Home Office / Scottish Office Radio Engineers > 4th Character is same as region coverded > e.g. M2RW cover Wales M2RA Directorate of Telecoms England, Northern Area M2RB Directorate of Telecoms England, Billinge M2RC Regional Crime Squads National Co-ordinator M2RD Directorate of Telecoms England, Harrow M2RE Directorate of Telecoms England, Colwyn Bay M2RF Directorate of Telecoms England, Research Test Bed Scheme M2RG Directorate of Telecoms England, Bishops Cleeve M2RH Directorate of Telecoms England, Hannington M2RK Directorate of Telecoms England, Cranbrook M2RL Directorate of Telecoms England, Marley Hill M2RM Directorate of Telecoms England, London M2RN Directorate of Telecoms England, Stanton M2RP Directorate of Telecoms England, Radio System Planning Group M2RO Directorate of Telecoms England, Site Survey Team M2RQ Directorate of Telecoms England, Shapwick M2RR Directorate of Telecoms England, Collective M2RS Directorate of Telecoms England, Southern Survey Team M2RT Directorate of Telecoms England, Weyhill M2RU Directorate of Telecoms England, Midlands Area M2RV Directorate of Telecoms England, Cheveley M2RW Directorate of Telecoms England, Bridgend M2RX Directorate of Telecoms England, Kippax M2RY Directorate of Telecoms England, Romsley M2RZ Directorate of Telecoms England, Tavistock M2SA SRDB Langhurst M2SC Directorate of Telecoms Scotland, Cambusbarron M2SD SRDB Sandridge M2SE Directorate of Telecoms Scotland, East Kilbride M2SG Directorate of Telecoms Scotland, Edinburgh M2SH Directorate of Telecoms Scotland, Headquarters M2SI Directorate of Telecoms Scotland, Inverness M2SJ Directorate of Telecoms Scotland, Montreathmont M2SM M25 Motorway Police M2SP Prison Service College, Tulliallan Castle M2SS Directorate of Telecoms England, WARC Site Survey M2ST Directorate of Telecoms England, WARC Site Survey M2SU Directorate of Telecoms Scotland, WARC Site Survey M2SW Directorate of Telecoms Scotland, WARC Site Survey M2SY Prison Service, Rolleston M2TA HMP Aberdeen M2TB HMP Barlinnie M2TC HMP (Y) Cornton Vale M2TD HMP (Y) Dumfries M2TE HMP Edinburgh M2TF HMP Friarton M2TG HMP (Y) Glenochil M2TI HMP Inverness M2TH HMP (Y) Castle Hantly M2TJ HMP Dungavel M2TK HMP Greenock M2TL HMP Low Moss M2TM HMP (R) Longingend M2TN HMP Noranside M2TO HMP Peterhead M2TP HMP Perth M2TQ HMP Penninhame M2TR HMP (Y) Polmont M2TS HMP Shotts M2TT Prison Service College, Brightons Scotland M2TU Great Ullane Fire Service College M2TV Bank of England M2TX Carstairs Prison Service Hospital M2U- Northern Scotland region M2UB Grampian Police M2UF Northern Fire (Highland Region) M2UGF Grampian Fire M2UR Northern Constabulary (Highland Region) > M2V- East Anglia region M2VA Bedfordshire Police M2VB Cambridgeshire Police M2VC Cambridgeshire Fire M2VD Essex Fire M2VF Norfolk Fire M2VG Essex Police M2VH Hertfordshire Police M2VI Hertfordshire Fire M2VK Norfolk Police M2VL Suffolk Police (Stradishall, High Point prison). M2VM Bedfordshire Fire M2VN Suffolk Fire M2VR Harwich Immigration Branch M2VW HMP Wayland M2W- Wales M2WA North Wales Police (Clwyd & Gwynedd) M2WB Powys Fire M2WC Gwynedd Fire M2WD South Glamorgan Fire M2WE Gwent Police (County) M2WF Mid Glamorgan Fire M2WH Dyfed-Powys Police M2WK Clwyd Fire M2WL South Wales Police (Mid Glamorgan) M2WN Gwent Police (Newport) M2WO Gwent Police (Traffic) M2WP Gwent Fire M2WS South Wales Police (West Glamorgan) M2WT HMP (D) Werrington House M2WV Dyfed Fire M2WX South Wales Police (Ch 04) M2WY South Wales Police (South Glamorgan) M2WZ West Glamorgan Fire M2X- Yorkshire region M2XB HMP (Y) Wetherby M2XC HMP (D) Campsfield House M2XF West Yorkshire Fire M2XG HMP (Y) Lowdham Grange M2XH Humberside Police Ch.2 only. North Bank ops channel. M2XJ Humberside Police Ch.1 only. Admin and updating channel. M2XK HMP Stocken M2XL HMP Lindholme M2XN North Yorkshire Police M2XQ Prison Service College, Newbold Revel M2XR HMP Rudgate M2XS South Yorkshire Police M2XT Humberside Fire M2XV South Yorkshire Fire M2XW West Yorkshire Police M2XY Humberside Police Ch.3 only. South Bank ops channel. M2Y- Midlands region M2YB Hereford & Worcester Fire M2YC HMP (R) Brockhill M2YD West Midlands Fire Coventry M2YE West Midlands Fire Sandwell M2YF Staffordshire Police M2YG Staffordshire Fire M2YH HMP (Y) Stoke Heath M2YJ Warwickshire Police M2YK West Mercia Police (Hereford & Worcester) M2YM West Midlands Police M2YO West Midlands Fire Dudley M2YS Warwickshire Fire M2YU Shropshire Fire M2YX West Midlands Fire Walsall M2YY West Midlands Fire Wolverhampton M2YZ Moreton-in-Marsh Fire Service College M2Z- South East Scotland M2ZF Lothian & Borders Fire M2ZH Lothian & Borders Police M2ZM Royal Marines M2ZS Tayside Police M2ZSF Tayside Fire M2ZT Fife Police M2ZTF Fife Fire M2ZY Special Use Undisclosed M2ZZ Special Use Undisclosed