Telegraph: The number of people with the condition, which can cause itchy, watery eyes, a bunged up nose and bouts of coughing and sneezing, has been steadily increasing in recent decades. One in three people in this country could suffer from the problem by 2040, up from around one in four who at the moment will develop the problem at some point in their lives, a new report predicts. Caused by an allergy to pollen, most significantly grass pollen, hayfever symptoms currently tend to flare …