South West London mobile coverage O2 indoors runs from 41% to 100% by district SW postcode area
No network wins South West London on overall coverage: all four score 100/100.
South West London as a whole
Ofcom Mobile Coverage data (May 2025), measured across 3,148 addresses in 125 sampled postcodes, pooled from 23 districts. Methodology.
What differs inside South West London
Where the networks split most
- SW15 Putney, Mortlake, West Hill: indoors EE, Three and Vodafone 100%, O2 41%.
Each network's weakest and strongest district
| Network | Indoor |
|---|---|
| O2 | 41% in SW15 Putney; 100% in 21 districts |
Middle of the area against its edges
The 7 districts nearest the middle (SW3 Chelsea, SW4 Clapham, SW6 Fulham, SW10 Fulham, SW11 Wandsworth, SW12 Clapham, SW18 Wandsworth) against the 7 furthest out (SW2 Streatham Hill, SW9 Clapham, SW13 Barnes, SW14 Mortlake, SW16 Norbury, SW19 Wimbledon, SW20 Hillside): no network differs by 8 points or more between them.
District by district
| District | Places | Indoor, low to high | Addresses |
|---|---|---|---|
| SW1A | Nine Elms, St James's | 100% on all four | 7 small sample |
| SW1P | Nine Elms, St James's, Vincent Square | 100% on all four | 106 |
| SW1V | Pimlico, Belgravia, Nine Elms | 100% on all four | 263 |
| SW1W | Chelsea, Kensington, Belgravia | 100% on all four | 101 |
| SW2 | Streatham Hill, Thornton, Herne Hill | 100% on all four | 118 |
| SW3 | Chelsea, Kensington, Stanley | 100% on all four | 107 |
| SW4 | Clapham, Balham, Lavender | 100% on all four | 169 |
| SW5 | Chelsea, Kensington, Abingdon | 100% on all four | 100 |
| SW6 | Fulham, Hammersmith, Lillie | 100% on all four | 194 |
| SW7 | Chelsea, Kensington, Brompton | 100% on all four | 76 |
| SW8 | Oval, Larkhall, Vauxhall | 100% on all four | 246 |
| SW9 | Clapham, Stockwell, Oval | 100% on all four | 114 |
| SW10 | Fulham, Chelsea, Kensington | 100% on all four | 96 |
| SW11 | Wandsworth, Balham, Lavender | 100% on all four | 206 |
| SW12 | Clapham, Balham, Thornton | 100% on all four | 140 |
| SW13 | Barnes, Mortlake, Barnes Common | 100% on all four | 70 |
| SW14 | Mortlake, East Sheen, Barnes Common | 100% on all four | 79 |
| SW15 | Putney, Mortlake, West Hill | O2 41%; the rest 100% | 161 |
| SW16 | Norbury, Graveney, Furzedown | 100% on all four | 145 |
| SW17 | Wandle, Graveney, Furzedown | 100% on all four | 247 |
| SW18 | Wandsworth, Wandle, St Mary's | 100% on all four | 78 |
| SW19 | Wimbledon, Wandle, Hillside | 100% on all four | 180 |
| SW20 | Hillside, Dundonald, Cannon Hill | 100% on all four | 145 |
Marked small sample: under 30 addresses sampled. Listed, but left out of the comparisons above.
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