Photo: Roger Cornfoot · CC BY-SA 2.0Trethomas sees more crime per resident than 96% of UK towns
Violence recorded locally dropped 34% in a year. Counting crimes police recorded inside Trethomas’s built-up area from September 2023 to August 2026, it grades D− for safety. Public order: police recorded 21 here in the 12 months to August 2026, 12.3 per 1,000 residents against 2.4 in a typical town its size. Annual rates stand at 58.0 violent and sexual offences and 19.5 incidents of burglary, vehicle crime and damage for every thousand residents.
Crimes and reports per 1,000 residents (Census 2021) a year, September 2023 to August 2026.
What stands out about safety in Trethomas
Violent crime fell over the year
In the 12 months to August 2026 police recorded 34% less violent crime per resident in Trethomas than in the year before; across UK towns of 1,000 to 2,500 people violent crime held steady. Trend ↓
Neighbourhood ranks
82% of Trethomas’s residents live in a neighbourhood ranked in the highest-crime 20% of Wales (WIMD 2025 community safety), and 0% in the lowest-crime 30%. Neighbourhood ranks ↓
Written from the police.uk and government data on this page. Figures are crimes police recorded, not convictions.
What’s behind Trethomas’s grade
A fairly firm grade. Built on 398 graded crimes over three years. The grade adds violent and sexual offences and crimes against homes and vehicles per resident and ranks Trethomas against every UK town of 1,000 or more.
Per resident, against all UK towns; beside it, how it compares with towns its size.
How crime in Trethomas has moved
“Towns its size” pools all UK towns of 1,000 to 2,500 people that police.uk covers each month (Greater Manchester has no data).
Rolling twelve-month rate, per 1,000 residents a year (longer windows for smaller places, where a few crimes swing a month). In the 12 months to August 2026 against the 12 before: violent -34% (towns its size +3%), homes and vehicles -36% (towns its size +0%), anti-social behaviour +41% (towns its size -1%).
What police recorded in the last 12 months
Against the typical town its size, Trethomas runs highest on public order (12.3 per 1,000 against 2.4), criminal damage & arson (11.7 per 1,000 against 3.2) and anti-social behaviour (18.1 per 1,000 against 5.3).
Show as a table
| Category | In the grade | Reports | Per 1,000 | Typical |
|---|---|---|---|---|
| Violence & sexual offences | Violent | 81 | 47.3 | 16.6 |
| Anti-social behaviour | not graded | 31 | 18.1 | 5.3 |
| Public order | not graded | 21 | 12.3 | 2.4 |
| Criminal damage & arson | Home & vehicle | 20 | 11.7 | 3.2 |
| Other theft | not graded | 7 | 4.1 | 2.5 |
| Burglary | Home & vehicle | 6 | 3.5 | 1.6 |
| Other crime | not graded | 4 | 2.3 | 1.1 |
| Drugs | not graded | 3 | 1.8 | 0.6 |
| Vehicle crime | Home & vehicle | 3 | 1.8 | 1.5 |
| Possession of weapons | Violent | 3 | 1.8 | 0 |
| Shoplifting | not graded | 0 | 0 | 0 |
| Bicycle theft | not graded | 0 | 0 | 0 |
| Robbery | Violent | 0 | 0 | 0 |
| Theft from the person | not graded | 0 | 0 | 0 |
“Violent” is police.uk’s violence and sexual offences (which includes harassment, stalking and assault without injury), robbery and possession of weapons. Anti-social behaviour isn’t a crime category; shoplifting and other theft happen mostly in shops and town centres rather than to residents, so neither counts in the grade.
September 2025 to August 2026, per 1,000 residents. The tick on each bar is the typical (median) town among UK towns of 1,000 to 2,500 people.
How Trethomas compares with UK towns of 1,000 to 2,000
| # | Town | People | Violent | Homes & vehicles | Shops & theft | Safety |
|---|---|---|---|---|---|---|
| 1 | Clipsham Rutland | 1,150 | 0 | 0 | 0 | A+ |
| … | ||||||
| 281 | Govilon Gwent | 1,342 | 13.2 | 4 | 3.7 | A |
| … | ||||||
| 440 | Caer-went Gwent | 1,523 | 14.9 | 5.7 | 2.2 | A− |
| … | ||||||
| 496 | Portskewett Gwent | 1,627 | 18 | 3.7 | 1.6 | A− |
| … | ||||||
| 552 | Penperlleni Gwent | 1,396 | 18.2 | 5 | 1.4 | A− |
| … | ||||||
| 1184 | Ansley Warwickshire | 1,046 | 50 | 24.5 | 6.4 | D |
| 1185 | Markham Gwent | 1,443 | 57.1 | 18.5 | 7.2 | D |
| 1186 | Johnston Dyfed | 1,766 | 63.7 | 12.5 | 10.8 | D |
| 1187 | Trethomas Gwent | 1,713 | 58 | 19.5 | 5.6 | D− |
| 1188 | Poyle Berkshire | 1,736 | 44.6 | 34.8 | 13.6 | D− |
| 1189 | Colnbrook Berkshire | 1,898 | 48.1 | 31.3 | 22.7 | D− |
| 1190 | Startforth County Durham | 1,391 | 71.2 | 9.4 | 2.2 | D− |
| … | ||||||
| 1214 | Ingoldmells Lincolnshire | 1,928 | 259 | 64.7 | 57.2 | D− |
Safety letters rank against every UK town of 1,000 or more; the order here is context only.
Graded crime per 1,000 residents a year, September 2023 to August 2026, counting from the least: towns ranked near Trethomas, and others in Gwent.
Crime in Trethomas per 1,000 residents
A crime isn’t a victim: one person can report several, and crimes in a town centre often involve visitors rather than residents.
And about 17 burglaries, vehicle crimes or acts of criminal damage, plus 4 shoplifting and theft reports, in the 12 months to August 2026. Each dot is one resident; each coloured dot is one recorded crime.
Police in Trethomas identify a suspect more often than across UK towns
No suspect was identified for 58% of Trethomas’s burglaries, vehicle crimes and criminal damage, against 69% across UK towns, and for 3% of violent and sexual offences against 19%. Most violent cases close as “unable to prosecute” (62% here), usually because the victim doesn’t support a prosecution. About 10% of violent and 12% of household crimes reached court.
The latest outcome police.uk shows for each crime recorded in the first of the three years (September 2023 to August 2024), so most cases have closed. 113 crimes.
No one died in a collision on Trethomas’s roads in 2021–2025
Police recorded 2 collisions with injuries inside Trethomas in five years. 1 person was killed or seriously injured: 0 on foot and 0 on a bicycle.
Most UK towns of 1,000 to 2,500 people (94%) had no road deaths in these five years, and Trethomas is one of them.
Counting serious injuries too, a town of Trethomas’s size at the median for UK towns of 1,000 to 2,500 people would see about 1 people killed or seriously injured in five years; Trethomas had 1.
Casualties are counted where the collision happened, not where people lived: a main road through town adds through-traffic, and residents’ own risk on roads elsewhere isn’t here. Seriously injured uses the Department for Transport’s adjusted figures, which even out the police forces’ different ways of recording injuries. There’s no national rate here: more than half of road deaths in England and Wales (58%) happen outside every town’s built-up area. Source: DfT road casualty statistics (STATS19), 2021–2025.
Collisions police recorded inside Trethomas’s built-up area, 2021–2025. Described here; not part of the Safety Grade.
Crime in the places around Trethomas
| Town | People | Violent | Homes & vehicles | Safety |
|---|---|---|---|---|
| Trethomas | 1,713 | 58 | 19.5 | D− |
| Bedwas | 6,463 | 39.4 | 14.8 | C− |
| Machen | 1,985 | 20 | 9.1 | B |
| Cwmfelinfach | 1,353 | 30.8 | 16 | C |
| Llanbradach | 3,766 | 32.7 | 14.7 | C− |
| Caerphilly | 33,104 | 42.1 | 18.6 | D |
| Risca | 15,194 | 44.2 | 18.7 | D |
| Abercarn | 5,123 | 35.5 | 16.7 | C− |
Trethomas records more graded crime per resident than every neighbour in the table. Bedwas, 1.3 miles away, records 39.4 violent and sexual offences per 1,000 residents a year (3-year average), against Trethomas’s 58.
Per 1,000 residents a year, the same three years. Tap a town for its safety page.
What this data can and can’t tell you
- Where crimes happen, not where victims live. police.uk places each crime at a point near where it happened. Town centres with shops, stations, a hospital and nightlife record more crime per resident, and residents of nearby villages who come in to shop or go out are part of that count.
- Bigger towns record more per resident. Across UK towns, recorded crime per resident rises steeply with size, more than in the U.S., so a city’s grade sits low against the whole UK. The “towns its size” figures show where Trethomas sits among towns like it; they are context and don’t change the grade.
- Points are approximate. police.uk moves each point to the nearest of a set of anonymous map points, so crimes near the edge of the built-up area can fall either side of it.
Questions about safety in Trethomas
Is Trethomas safe?
Police recorded 58 violent and sexual offences and 19.5 burglaries, vehicle crimes and acts of criminal damage per 1,000 residents a year over the three years to August 2026 (police.uk, inside Trethomas’s built-up area). That earns a D− for safety: less crime per resident than 4% of UK towns. Among UK towns of 1,000 to 2,500 people, Trethomas has less crime per resident than 2%.
Is crime going up in Trethomas?
In the 12 months to August 2026, against the 12 months before, violent crime fell 34%, burglary, vehicle crime and damage fell 36%, shoplifting and theft fell 36% and anti-social behaviour rose 41%. Across UK towns of 1,000 to 2,500 people, violent crime held steady.
What is the most common crime in Trethomas?
Violence & sexual offences: 81 in the 12 months to August 2026, which in police.uk includes harassment, stalking and assault without injury. Next came public order (21) and criminal damage & arson (20), with 31 reports of anti-social behaviour.
How does Trethomas compare with Caerphilly?
Caerphilly records 42.1 violent and sexual offences and 18.6 crimes against homes and vehicles per 1,000 residents a year, against Trethomas’s 58 and 19.5, over the same three years.
Sources: data.police.uk street-level crime, 36 months to August 2026, points inside the built-up-area boundary · ONS Census 2021, output areas summed to the ONS 2022 built-up area · Welsh Government Welsh Index of Multiple Deprivation 2025, community safety domain by LSOA · Department for Transport road casualty statistics (STATS19), collisions 2021–2025, points inside the built-up-area boundary · TownRatings grades: our own summary of the data, ranked against UK towns only. All under the Open Government Licence v3.0.
Contains public sector information licensed under the Open Government Licence v3.0. Contains HM Land Registry data © Crown copyright and database right 2026. Contains OS data © Crown copyright and database right 2026 (ONS boundaries). Northern Ireland: Source: NISRA; contains Land & Property Services data and Ordnance Survey of Northern Ireland information, © Crown copyright, licensed under the Open Government Licence v3.0. Scotland: contains National Records of Scotland data, Registers of Scotland data and SEPA data, © Crown copyright / © SEPA 2025, licensed under the Open Government Licence v3.0.