Mersea mobile coverage Three 0% indoors here, 91% across Colchester CO5 · Braintree
EE has the best measured coverage in CO5: 91/100, 13 points ahead of Three on Ofcom's overall score, with O2 within 2 points.
CO5: Mersea, Feering, Tiptree, Kelvedon, Tolleshunt D'Arcy, Birch, Great, Peldon (Braintree, Colchester, Maldon).
CO5 scores
Ofcom Mobile Coverage data (May 2025), measured across 19 addresses in 5 sampled postcodes: CO5 7RN, CO5 7RP, CO5 7RR, CO5 7RT, CO5 9UT. Methodology.
How CO5 compares
small sample 19 addresses in 5 postcodes, under the 30 needed for a firm comparison. The figures are shown, but not compared.
Weakest spot in Colchester: CO6 Marks Tey, where Vodafone reaches 21% indoors.
Indoor signal around CO5
| District | km away | EE | O2 | Three | Vodafone |
|---|---|---|---|---|---|
| CO5 Mersea (here) small sample | – | 42% | 26% | 0% | 0% |
| CO2 Stanway, Birch | 8 | 79% | 94% | 86% | 100% |
| CO3 Stanway, Birch | 8 | 100% | 77% | 100% | 100% |
| CO1 Tiptree, Myland | 9 | 100% | 100% | 100% | 100% |
| CO6 Marks Tey, Coggeshall | 12 | 51% | 95% | 90% | 21% |
| Colchester average | – | 90% | 90% | 91% | 86% |
Small sample: under 30 addresses sampled.
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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: EE leads this page on Ofcom's data alone.
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