| ZONE 1 | ZONE 2 | ZONE 3 | ZONE 4 |
| ALL ENGLAND & WALES POSTCODES | DD, DG, EH, FK, G, KY, ML, TD | AB31-38, AB40-56 | HS |
| KA (EXCEPT KA27, KA28) | IV1-28, IV30-32, IV36, IV40, IV52-54, IV63 | IV41-49, IV51, IV55-56 | |
| AB1-16 , AB21-25, AB30, AB39 | KW1-14 | KA27-28 | |
| PA1-19 | PA21-38 | KW15-17 | |
| PH1-3 | PH4-41 | PA20, PA41-49, PA60-78 | |
| BT (NORTHERN IRELAND) | PH42-44 | ||
| ISLE OF WIGHT, ISLE OF SCILLY | IoM, CHANNEL ISLANDS |
