SIR – John Skipper (Letters, January 2) draws our attention to restrictions in some European countries, where young drivers are limited to carrying passengers over the age of 21 for the first year after passing their test. How I wish that was the law in Britain. Many years ago, my 17-year-old son was tragically killed as a result of reckless driving by his best friend of a similar age. Not only have his three brothers lived with great sadness, but the young driver has also had to bear the conseq