CM23
Postcode districtPostcode district covering Bishop's Stortford, New Town and Hockerill, in East Hertfordshire.
Approximate outline worked out by Open Index from the ONS Postcode Directory: each census output area belongs to the district that holds most of its postcodes. People, homes, recorded crime and broadband add up those output areas. House sales count every sale with an CM23 postcode. How census figures are added up
Gigabit coverage by postcode district
Connected Nations (Ofcom) · January 2026
In CM23, 87.7% of homes and businesses could get gigabit-capable broadband in January 2026.
How CM23 compares
Each dot is a postcode district. The black line marks the middle one.
Is CM23 safe? What police records show
In the 12 months to August 2026, police recorded crimes and anti-social behaviour in CM23 at a rate of 79.4 per 1,000 people.
That compares with 77.3 per 1,000 people across CM.
In August 2026 alone, 365 cases of crime and anti-social behaviour were recorded in CM23.
In the 12 months to August 2026, the most common types were violence and sexual offences (1,255), anti-social behaviour (908) and other crime (549).
A year earlier, the recorded crime rate in CM23 was 71.0 per 1,000 people.
Worked out by Open Index from police.uk crime records and ONS and NISRA population estimates.
Rates are per resident, so places that many people work in or visit, such as Westminster, the City of London and other city centres, have far higher rates than their residents alone would suggest.
Deprivation in CM23, neighbourhood by neighbourhood
- Deprivation is ranked by neighbourhood, so CM23 has no single figure. Of its 27 neighbourhoods with a rank:
- Decile 3: 1 neighbourhood
- Decile 6: 1 neighbourhood
- Decile 7: 4 neighbourhoods
- Decile 8: 2 neighbourhoods
- Decile 9: 4 neighbourhoods
- Decile 10 (England’s least deprived 10%): 15 neighbourhoods
English Indices of Deprivation 2025. Decile 1 is the most deprived tenth of neighbourhoods in England.
Neighbourhoods in CM23
| Name | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband |
|---|---|---|---|---|
| East Hertfordshire 003A | 1,303 | 19.5 per 1,000 | 10 | 100.0% |
| East Hertfordshire 003B | 2,074 | 56.4 per 1,000 | 10 | 94.3% |
| East Hertfordshire 003C | 2,227 | 73.5 per 1,000 | 10 | 98.2% |
| East Hertfordshire 003D | 1,363 | 25.5 per 1,000 | 10 | 90.1% |
| East Hertfordshire 004A | 1,819 | 139.3 per 1,000 | 10 | 72.8% |
| East Hertfordshire 004C | 2,307 | 45.7 per 1,000 | 10 | 86.9% |
| East Hertfordshire 004D | 1,610 | 124.6 per 1,000 | 7 | 97.2% |
| East Hertfordshire 004E | 1,131 | 416.6 per 1,000 | 6 | 41.2% |
| East Hertfordshire 005A | 1,527 | 60.1 per 1,000 | 9 | 92.0% |
| East Hertfordshire 005B | 1,417 | 58.9 per 1,000 | 8 | 97.4% |
| East Hertfordshire 005C | 1,737 | 36.6 per 1,000 | 10 | 77.5% |
| East Hertfordshire 005D | 1,523 | 65.6 per 1,000 | 9 | 86.7% |
| East Hertfordshire 005E | 2,256 | 68.7 per 1,000 | 9 | 84.6% |
| East Hertfordshire 007A | 1,403 | 17.4 per 1,000 | 10 | 84.9% |
| East Hertfordshire 007B | 1,904 | 60.0 per 1,000 | 10 | 92.7% |
| East Hertfordshire 007C | 1,735 | 89.3 per 1,000 | 7 | 91.7% |
| East Hertfordshire 007E | 1,327 | 89.3 per 1,000 | 3 | 96.5% |
| East Hertfordshire 007F | 1,472 | 119.3 per 1,000 | 10 | 91.9% |
| East Hertfordshire 007G | 1,451 | 208.2 per 1,000 | 8 | 88.6% |
| East Hertfordshire 007H | 1,081 | 182.3 per 1,000 | 7 | 91.5% |
| East Hertfordshire 008A | 1,336 | 12.3 per 1,000 | 10 | 91.0% |
| East Hertfordshire 008B | 1,472 | 25.2 per 1,000 | 10 | 95.3% |
| East Hertfordshire 008C | 1,380 | 35.6 per 1,000 | 9 | 95.8% |
| East Hertfordshire 008D | 1,293 | 59.4 per 1,000 | 10 | 89.1% |
| East Hertfordshire 008E | 1,545 | 79.2 per 1,000 | 10 | 91.6% |
| East Hertfordshire 008F | 1,557 | 28.0 per 1,000 | 10 | 100.0% |
| Uttlesford 005G | 1,612 | 21.6 per 1,000 | 7 | 77.7% |
MPs for CM23
- Josh DeanLabourMP for Hertford and Stortford92% of CM23’s postcodes
- Mrs Kemi BadenochConservativeMP for North West Essex8.2% of CM23’s postcodes
- Chris VinceLabour (Co-op)MP for Harlow0.2% of CM23’s postcodes
- Chris HinchliffLabourMP for North East Hertfordshire0.1% of CM23’s postcodes
As of , from the UK Parliament Members API. Contains Parliamentary information licensed under the Open Parliament Licence v3.0. Source: UK Parliament, Members API.
Middle areas in CM235
Postcode sectors in CM237
Council1
Towns in CM231
Postcode districts next to CM236
Nearest rail stations2
More in the CM postcode area2
CM23 in brief
CM23 is a postcode district covering Bishop's Stortford, New Town and Hockerill, in East Hertfordshire.
About 47,349 people lived in CM23 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £437,500 in 2025 across 804 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 79.4 per 1,000 people in the 12 months to August 2026 (police.uk).
The median price paid for a home in CM23 was £437,500 in 2025.
CM23 had 44,136 usual residents at the census.
In CM23, 87.7% of homes and businesses could get gigabit-capable broadband in January 2026.
In CM23, 1.9% of residents aged 16 to 64 were claiming out-of-work benefits in August 2026.