Clapham mobile coverage Within 8 points of the South West London average SW4 · Lambeth
No network wins SW4 on overall coverage: all four score 100/100.
SW4: Clapham, Balham, Lavender, Larkhall, Abbeville, Northcote, Stockwell West, Brixton Acre Lane (Lambeth, Wandsworth).
SW4 scores
Ofcom Mobile Coverage data (May 2025), measured across 169 addresses in 6 sampled postcodes: SW4 0AD, SW4 6BG, SW4 7BB, SW4 7EA, SW4 7JL, SW4 7UH. Methodology.
How SW4 compares
Every network here is within 8 points of the South West London average and of SW2 Streatham Hill, SW8 Oval, SW9 Clapham and SW12 Clapham, indoors and outdoors.
Weakest spot in South West London: SW15 Putney, where O2 reaches 41% indoors.
Indoor signal around SW4
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1pMobile runs on EE's network: £5 a month for 5GB (read 19 October 2026). A price, not a coverage ranking: Ofcom separates no network here.
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