| Abbots Langley |
WD5 |
| Amersham |
HP7 |
| Aylesbury |
HP19, HP20, HP21 |
| Bengeo |
SG14 |
| Berkhamsted |
HP4 |
| Bushey |
WD23 |
| Bricket Wood |
AL2 |
| Brookmans Park |
AL9 |
| Borehamwood |
WD6 |
| Chalfont St. Giles |
HP8 |
| Chesham |
HP5 |
| Chiswell Green |
AL2 |
| Chorley Wood |
WD3 |
| Codicote |
SG4 |
| Digswell |
AL6 |
| Elstree |
WD6 |
| Flamstead |
AL3 |
| Great Missenden |
HP16 |
| Haddenham |
HP17 |
| Harpenden |
AL5 |
| Hatfield |
AL9, AL10 |
| Hertford |
SG14 |
| Hitchin |
SG4, SG5 |
| Kimpton |
SG4 |
|
| Kings Langley |
WD4 |
| Knebworth |
SG3 |
| Letchworth |
SG6 |
| London Colney |
AL2 |
| Luton |
LU1, LU2, LU3, LU4, LU5, LU6, LU7, LU95 |
| Markyate |
AL3 |
| Potters Bar |
EN6 |
| Prestwood |
HP16 |
| Princes Risborough |
HP27 |
| Radlett |
WD7 |
| Redbourn |
AL3 |
| Rickmansworth |
WD3 |
| St Albans |
AL1, AL2, AL3, AL4 |
| Sandridge |
AL4 |
| Shenley |
WD7 |
| Stevenage |
SG1, SG2 |
| Tring |
HP23 |
| Ware |
SG11, SG12 |
| Watford |
WD17, WD24 |
| Wendover |
HP22 |
| Welwyn |
AL6 |
| Welwyn Garden City |
AL7, AL8 |
| Wheathampstead |
AL4 |
|
