Chelmsford postal code postal code Chelmsford postal code postal code can also be referred to as Chelmsford postal code zip code or Chelmsford postal code postcode. See the complete list of all Chelmsford postal code code in United Kingdom below: Chelmsford postal code┬áPostal Code is CM1 1HT Address example: Chelmsford Station, Chelmsford CM1 1HT, UK…