Sectors in CM1
| Sector | Main place | Postcodes |
|---|---|---|
| CM1 1 | Chelmsford | 208 |
| CM1 2 | Chelmsford | 253 |
| CM1 3 | Writtle | 225 |
| CM1 4 | Chelmsford | 313 |
| CM1 6 | Chelmsford | 274 |
| CM1 7 | Chelmsford | 208 |
| CM1 9 | Chelmsford | 80 |
Places covered by CM1
- Chelmsford Chelmsford · 1,166
- Writtle Chelmsford · 112
- Broomfield Chelmsford · 80
- Roxwell Chelmsford · 19
- Good Easter Chelmsford · 12
- High Easter Uttlesford · 9
- Chignall St James Chelmsford · 8
- Loves Green Chelmsford · 8
- Edney Common Chelmsford · 7
- Mashbury Chelmsford · 7
- Boyton Cross Chelmsford · 4
- Cooksmill Green Chelmsford · 3
- Chalk End Chelmsford · 2
- Stagden Cross Uttlesford · 2
- Chignall Smealy Chelmsford · 1
- Clatterford End Chelmsford · 1
- Farmbridge End Chelmsford · 1
- Pepper's Green Uttlesford · 1