ZONE 3 – AL, B, BA, BB, BD, BH, BL, BN, BR, BS, CF, CH, CR, CT, CV, CW, DA, DE, DH, DL, DN, DT, DY, E, EC, EN, FY, GL, GU, HA, HD, HG, HP, HR, HU, HX, IG, KT, L, LA, LD, LE, LN, LS, LU, M, ME, MK, N, NG, NN, NP, NW, OL, OX, PO (exc 30-41), PR, RG, RH, RM, S, SE, SK, SL, SM, SN, SO, SP, SR, ST, SW, SY, TF, TN, TS, TW, UB, W, WA, WC, WD, WF, WN, WR, WS, WV, YO