THE BBC Countryfile Special on the Queen’s Windsor Estate (May 27) showed an Archimedes power installation obtaining green energy from the Thames.

Police guarding Salisbury Mill have had the hypnotising view of possibly 100 kW of river energy going to waste.

These screw type water mills are a great improvement on the hydro electric generator at the Mill site scrapped many years ago.

When will someone sponsor such a green energy installation here?

Christopher Penfold