I discussed the gluten free diet with many people including my GP. The general consensus was that unless you have been diagnosed via blood test with coeliac disease, then a gluten free diet was too hard, too restrictive and unnecessary.
With dairy free, it appears there are some reports that show improvement in asthma and sinus conditions and some that don't. Dairy free is much easier to achieve and therefore I am going to give it a go. My GP thinks that any positive result should be seen in 2-3 weeks.
In the meantime I am having some RAST tests for allergies and have an appointment booked with a specialist in February 2010! Never mind - 30 odd years a few more months won't hurt.