Dedworth mobile coverage O2 90% indoors here, 100% in SL3 nearby SL4 · Bracknell Forest
No network wins SL4 on overall coverage: all four are within 2 points, but indoors EE, Three and Vodafone reach 100% of sampled addresses and O2 90%.
SL4: Dedworth, Bray, Eton, Ascot, Winkfield, Old Windsor, Sunninghill, Dorney (Bracknell Forest, Buckinghamshire, Runnymede).
SL4 scores
Ofcom Mobile Coverage data (May 2025), measured across 178 addresses in 6 sampled postcodes: SL4 3DT, SL4 3NL, SL4 3QA, SL4 3RD, SL4 3SD, SL4 3TW. Methodology.
How SL4 compares
Every network here is within 8 points of the Slough average, indoors and outdoors.
Weakest spot in Slough: SL9 Denham, where EE reaches 14% indoors.
Lowest indoor figure of the 8 Slough districts sampled, for O2.
Indoor signal around SL4
| District | km away | EE | O2 | Three | Vodafone |
|---|---|---|---|---|---|
| SL4 Dedworth (here) | – | 100% | 90% | 100% | 100% |
| SL1 Cippenham, Burnham small sample | 5 | 100% | 100% | 100% | 100% |
| SL3 Iver, Stoke Poges | 6 | 100% | 100% | 100% | 100% |
| SL2 Burnham, Britwell | 7 | 100% | 100% | 100% | 100% |
| SL5 Ascot, Chobham | 8 | 100% | 100% | 100% | 100% |
| Slough average | – | 95% | 97% | 100% | 100% |
Biggest difference nearby: O2 indoors, 90% here and 100% in SL3 Iver, 6 km away.
Small sample: under 30 addresses sampled.
Compare plans
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.
1pMobile plans →Some links on this page are affiliate links. How we rank.