SIR - Yet again the threat of fluoride in our tap water is raising its head. However many experts claim fluoride can cause the risk of cancer and heart problems.

Those who wish to dose themselves with fluoride are able to do so by taking pills and using fluoride toothpaste.

But it is significant to note that prior to fluoride being added to most toothpastes the advertisements would show one inch or more paste being spread on the toothbrush.

Those pastes which now contain fluoride carry the warning that not more than a pea-sized amount should be used!

Influenza is a great danger and free injections are offered to the elderly and others who are at risk - but it is not compulsory. If fluoride is added to the water supply the whole population has little chance to avoid it.

As many elderly people believe their daily nip of whisky has helped them achieve their longevity, why don't they put whisky in our water supply so that we all may benefit?

It's no more a ridiculous idea than that suggested by the Bradford and Airedale Teaching Primary Care Trust.

Peter Rushforth, Sutton Drive, Cullingworth