A

AA, AB, AC, AD, AE, AF, AG, AH, AJ, AK, AL, AM, AN

Anglia

Peterborough

AO, AP, AR, AS, AT, AU

Anglia

Norwich

AV, AW, AX, AY

Anglia

Ipswich

B

BA, BB, BC, BD, BE, BF, BG, BH, BJ, BK, BL, BM, BN, BO, BP, BR, BS, BT, BU, BV, BW, BX, BY

Birmingham

Birmingham

C

CA, CB, CC, CD, CE, CF, CG, CH, CJ, CK, CL, CM, CN, CO

Cymru

Cardiff

CP, CR, CS, CT, CU, CV

Cymru

Swansea

CW, CX, CY

Cymru

Bangor

D

DA, DB, DC, DD, DE, DF, DG, DH, DJ, DK

Deeside to Shrewsbury

Chester

DL, DM, DN, DO, DP, DR, DS, DT, DU, DV, DW, DX, DY

Deeside to Shrewsbury

Shrewsbury

E

EA, EB, EC, ED, EE, EF, EG, EH, EJ, EK, EL, EM, EN, EO, EP, ER, ES, ET, EU, EV, EW, EX, EY

Essex

Chelmsford

F

FA, FB, FC, FD, FE, FF, FG, FH, FJ, FK, FL, FM, FN, FP

Forest and Fens

Nottingham

FR, FS, FT, FV, FW, FX, FY

Forest and Fens

Lincoln

G

GA, GB, GC, GD, GE, GF, GG, GH, GJ, GK, GL, GM, GN, GO

Garden of England

Maidstone

GP, GR, GS, GT, GU, GV, GX, GY

Garden of England

Brighton

H

HA, HB, HC, HD, HE, HF, HG, HH, HJ

Hampshire and Dorset

Bournemouth

HK, HL, HM, HN, HO, HP, HR, HS, HT, HU, HV

Hampshire and Dorset

Portsmouth

HW

Hampshire and Dorset

Portsmouth (exclusive to IoW)

HX, HY

Hampshire and Dorset

Portsmouth

K

KA, KB, KC, KD, KE, KF, KG, KH, KJ, KK, KL

-

Luton

KM, KN, KO, KP, KR, KS, KT, KU, KV, KW, KX, KY

-

Northampton

L

LA, LB, LC, LD, LE, LF, LG, LH, LJ

London

Wimbledon

LK, LL, LM, LN, LO, LP, LR, LS, LT

London

Stanmore

LU, LV, LW, LX, LY

London

Sidcup

M

MA, MB, MC, MD, ME, MF, MG, MH, MJ, MK, ML, MM, MN, MO, MP, MR, MS, MT, MU, MV, MW, MX, MY

Manchester & Merseyside

Manchester

N

NA, NB, NC, ND, NE, NF, NG, NH, NJ, NK, NL, NM, NN, NO

North

Newcastle

NP, NR, NS, NT, NU, NV, NW, NX, NY

North

Stockton

O

OA, OB, OC, OD, OE, OF, OG, OH, OJ, OK, OL, OM, ON, OO, OP, OR, OS, OT, OU, OV, OW, OX, OY

Oxford

Oxford

P

PA, PB, PC, PD, PE, PF, PG, PH, PJ, PK, PL, PM, PN, PO, PP, PR, PS, PT

Preston

Preston

PU, PV, PW, PX, PY

Preston

Carlisle

R

RA, RB, RC, RD, RE, RF, RG, RH, RJ, RK, RL, RM, RN, RO, RP, RR, RS, RT, RU, RV, RW, RX, RY

Reading

Reading

S

SA, SB, SC, SD, SE, SF, SG, SH, SJ

Scotland

Glasgow

SK, SL, SM, SN, SO

Scotland

Edinburgh

SP, SR, SS, ST

Scotland

Dundee

SU, SV, SW

Scotland

Aberdeen

SX, SY

Scotland

Inverness

V

VA, VB, VC, VD, VE, VF, VG, VH, VJ, VK, VL, VM, VN, VO, VP, VR, VS, VT, VU, VV, VW, VX, VY

Severn Valley

Worcester

W

WA, WB, WC, WD, WE, WF, WG, WH, WJ

West of England

Exeter

WK, WL

West of England

Truro

WM, WN, WO, WP, WR, WS, WT, WU, WV, WW, WX, WY

West of England

Bristol

Y

YA, YB, YC, YD, YE, YF, YG, YH, YJ, YK

Yorkshire

Leeds

YL, YM, YN, YO, YP, YR, YS, YT, YU

Yorkshire

Sheffield

YV, YW, YX, YY

Yorkshire

Beverley