Sectors in TW1
| Sector | Main place | Postcodes |
|---|---|---|
| TW1 1 | London | 177 |
| TW1 2 | Twickenham | 151 |
| TW1 3 | Twickenham | 122 |
| TW1 4 | Twickenham | 168 |
| TW1 9 | Isleworth | 47 |
Places covered by TW1
- Twickenham Richmond upon Thames · 495
- London Camden · 95
- Isleworth Hounslow · 72
- Teddington Richmond upon Thames · 2