Remember water power in the renewables mix | Brief letters

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Your article (Why can’t Britain turn its green revolution into cheap energy? A visual analysis, 4 July) was an informative overview, yet I saw no mention of water power. If we are serious about building a resilient, low-carbon energy system, wave power, tidal power and hydroelectricity deserve to be part of the conversation alongside wind and solar. Veronica-Mae Soar Oldland, Gloucestershire

• Re your article (Mobile internet coverage in UK worse than any EU or G7 country, Which? says, 6 July), glancing at my mobile in the Square and Compass pub in Worth Matravers, a stone’s throw from Dorset cliffs, service is provided by Bouygues Telecom (France). Cherbourg is 58 nautical miles away. Gill Scott London