Sir - 'Two deaths so far this year linked to mobile phones' you reported last week. I'm surprised it isn't more. Every time I leave home - by car or on foot - I see drivers with mobiles held to their ears. Frequently it's mums with a carloads of children. White Van Man is a prime culprit. Perhaps most disconcerting are HGV drivers negotiating turns or roundabouts with one hand on the wheel and the other clutching a mobile. How do they change gear?

I've been driving for nearly 40 years, have automatic transmission but know full well that driving with one hand while on the phone would be well beyond my safety zone.

Clearly, the culprits - and in Oxfordshire they must run into hundreds, if not thousands, a day - feel virtually immune from prosecution. This ludicrous and highly-dangerous situation vividly demonstrates the folly of passing a law and not enforcing it. What is needed is a vigorous police crackdown and exemplary penalties imposed by the courts. Otherwise, people will continue to die and be maimed because of some drivers' wilful and selfish disregard of road safety.

Presumably as the new TV phones come in we might even have drivers watching some exciting sporting event as they negotiate our busy roads. Incredible? I don't think so. In our race to embrace ever more sophisticated new technology, its inventors seem to give scant thought to the unfortunate side-effects. Using mobile phones while driving is a notable example.

John Wright, Oxford