Clapham mobile coverage Within 8 points of the South West London average SW12 · Lambeth
No network wins SW12 on overall coverage: all four score 100/100.
SW12: Clapham, Balham, Thornton, Abbeville, Northcote, South Balham, Streatham Hill West (Lambeth, Wandsworth).
SW12 scores
Ofcom Mobile Coverage data (May 2025), measured across 140 addresses in 5 sampled postcodes: SW12 0BP, SW12 8PU, SW12 9AL, SW12 9PH, SW12 9QU. Methodology.
How SW12 compares
Every network here is within 8 points of the South West London average and of SW4 Clapham, SW17 Wandle, SW2 Streatham Hill and SW11 Wandsworth, indoors and outdoors.
Weakest spot in South West London: SW15 Putney, where O2 reaches 41% indoors.
Indoor signal around SW12
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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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