Public access to policing data for England and Wales.
The CM23 5 postcode sector, in the CM (Chelmsford) postcode area, with most records published by Hertfordshire Constabulary.
Updated October 2026.
Police published 673 street-crime records for CM23 5 from September 2025 to August 2026. That is 0.6% fewer than in the 12 months before. The rate is 73.0 per 1,000 residents counted in the Census 2021, against 91.4 for Hertfordshire Constabulary. A residents-only rate reads high where many people visit. Police locations are approximate.
September 2025 to August 2026. Street-crime records include anti-social behaviour.
Street-crime records
673
Share of CM23
18.1%
Year-on-year
-0.6%
CM23 5 holds 18.1% of the 3,725 records assigned to CM23 in the same window.
| Month | Street-crime records |
|---|---|
| September 2025 | 51 |
| October 2025 | 52 |
| November 2025 | 54 |
| December 2025 | 66 |
| January 2026 | 47 |
| February 2026 | 66 |
| March 2026 | 61 |
| April 2026 | 62 |
| May 2026 | 59 |
| June 2026 | 50 |
| July 2026 | 48 |
| August 2026 | 57 |
Published street-crime records (including anti-social behaviour), September 2025 to August 2026, per 1,000 usual residents in the Census 2021.
CM23 5
73.0
Hertfordshire Constabulary
91.4
673 records and 9,223 residents. Residents-only rates overstate crime where many people visit who do not live there, such as city centres, stations, and retail parks. Residents are counted at March 2021 while records are current, so areas with many newer homes can read higher.
No England and Wales comparison is shown, because not every force involved has published every month of this window.
Rates cover England and Wales only. Residents: Office for National Statistics, Census 2021 postcode estimates, Open Government Licence v3.0. How rates are built.
Each column is a share of that area's own records in the same window, so areas of different sizes compare fairly. Force: Hertfordshire Constabulary.
| Category | CM23 5 | CM23 | Force |
|---|---|---|---|
| Violence and sexual offences | 40.4% | 33.5% | 33.9% |
| Anti-social behaviour | 21.4% | 24.3% | 20.5% |
| Vehicle crime | 7.6% | 4.9% | 5.3% |
| Criminal damage and arson | 6.4% | 5.2% | 6.4% |
| Other theft | 5.8% | 7.0% | 7.9% |
| Public order | 5.1% | 4.7% | 5.3% |
| Shoplifting | 4.0% | 9.3% | 8.3% |
| Burglary | 3.1% | 3.5% | 3.3% |
Calendar-year totals for CM23 5 (December 2013 to August 2026).
| Year | Street-crime records |
|---|---|
| 2021 | 741 |
| 2022 | 725 |
| 2023 | 753 |
| 2024 | 747 |
| 2025 | 642 |
| 2026 (part year) | 450 |
Highest and lowest published crime rates by postcode district in Hertfordshire
Covers 100.0% of the 9,223 Census 2021 residents of CM23 5.
Of these residents in England, 0.0% live in the most deprived 20% of England's neighbourhoods and 73.8% in the least deprived 20%.
Share of residents in each decile, from 1 (most deprived) to 10 (least deprived) of England's small areas.
Deciles rank neighbourhoods within one nation, so English and Welsh deciles don't compare. They describe areas, not the people living in them, and crime is one of the things the index measures, so this mix partly overlaps the crime figures above. How this is built.
This page updates as new months are published, so a citation needs the months shown and the date you read it. One click selects the whole citation. The CSV holds this page's monthly and category figures for CM23 5 postcode sector, with the same source and months.
CrimeMapsUK. CM23 5 postcode sector: published street-crime records, September 2025 to August 2026. Source: data.police.uk, Open Government Licence v3.0. Retrieved 30 October 2026. Police locations are approximate; records are assigned to the area by nearest postcode. Postcode centroids from the ONS Postcode Directory. Source: Office for National Statistics licensed under the Open Government Licence v3.0. Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. https://crimemapsuk.com/crime/sectors/cm23-5/