Madam, – The photograph accompanying the article on “safe cycling” (HEALTHplus, March 1st) shows a cyclist and a cycling instructor neither of whom are wearing a helmet. Surely wearing a helmet while cycling is a basic safety requirement? A friend of mine who works in the ambulance services calls cyclists who don’t wear helmets “organ donors”. This might be a bit shocking, but it is based on his experience. – Yours, etc,