Whatever the source of electricity, the essential need is for an uninterrupted supply 24 hours a day, each day of the year, with an ample margin to cover winter peaks and summer troughs and when plant is maintained.
Wind as a renewable source is excellent when the wind blows.
What happens when calm weather prevails? The shortfall will have to be made up from standby facilities of equal capacity to that of windfarms.
You mention coal, but tend to play down its possible use.
Overcoming pollution problems of flue gas should not be beyond the wit of man, following which coal becomes an important source for the future. There are workable coal seams available with reserves stretching well into the next century.
Before privatisation, the electricity supply industry had well established research facilities. These were disbanded when private enterprise took over. Surely it would pay handsomely to provide funds to establish pollution free emissions from coal fired power stations.
Coal, gas from indigenous fields, some nuclear generation together with a small contribution from renewables, pumped storage, hydroelectric and wind should ensure the long term future of the vital energy requirement, all sources of which are located within the UK.
P O'Sullivan (M), Purley, Surrey, CR8 1RF