SL9 DISTRICT · BUCKINGHAMSHIRE
Denham mobile coverage EE 14% indoors here, 95% across Slough SL9 · Buckinghamshire
O2 has the best measured coverage in SL9: 100/100, 13 points ahead of EE on Ofcom's overall score, with Three within 0 points.
SL9: Denham, Gerrards Cross, Chalfont St Giles, Fulmer, Hedgerley, Chalfont St. Peter, Farnhams, Maple Cross (Buckinghamshire, Three Rivers).
SL9 scores
#1
O2
#2
Three
#3
Vodafone
#4
EE
Ofcom Mobile Coverage data (May 2025), measured across 50 addresses in 6 sampled postcodes: SL9 0GA, SL9 8JW, SL9 8LU, SL9 8NR, SL9 8RS, SL9 9AT. Methodology.
How SL9 compares
Against the Slough average
- EE indoors: 14% here, 95% across Slough (−81).
Lowest indoor figure of the 8 Slough districts sampled, for EE.
Indoor signal around SL9
| District | km away | EE | O2 | Three | Vodafone |
|---|---|---|---|---|---|
| SL9 Denham (here) | – | 14% | 100% | 100% | 100% |
| SL2 Burnham, Britwell | 8 | 100% | 100% | 100% | 100% |
| SL1 Cippenham, Burnham small sample | 10 | 100% | 100% | 100% | 100% |
| SL8 Cookham, Hedsor | 11 | 100% | 100% | 100% | 100% |
| SL3 Iver, Stoke Poges | 11 | 100% | 100% | 100% | 100% |
| Slough average | – | 95% | 97% | 100% | 100% |
Biggest difference nearby: EE indoors, 14% here and 100% in SL2 Burnham, 8 km away.
Small sample: under 30 addresses sampled.
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