| Postcode | Coverage Area |
| TW1 | Twickenham,St. Margarets,Strawberry Hill(East) |
| TW3 | Hounslow,Lampton,Whitton(North) |
| TW4 | Hounslow West,Hounslow Heath,Whitton(West),Cranford(South) |
| TW5 | Heston,Cranford(North),Osterley(West) |
| TW7 | Isleworth,Osterley(East And Centre) |
| TW8 | Brentford,Kew Bridge,Syon Park |
| TW13 | Feltham,Hanworth |
| TW14 | Feltham(Part Of Thestationarea), North Feltham,East Bedfont,Hatton |
| TW15 | Ashford |
| UB2 | Southall(South),Norwood Green |
| W3 | Acton District:acton,West Acton,North Acton(Part),South Acton,East Acton(West),Park Royal(South), Hanger Hill Garden Estate,Gunnersbury Park |
| W4 | Chiswick District:chiswick,Gunnersbury,Turnham Green,Acton Green, South Acton (Part),Bedford Park |
| W5 | Ealing District:ealing, South Ealing,Ealing Common, North Ealing,Northfields, (South And East),Pitshanger, Hanger Lane |
| W6 | Hammersmith District:hammersmith,Ravenscourt Park, Stamford Brook (Part) |
| W7 | Hanwell District-hanwell,Boston Manor(Part) |