My Lords, we are all indebted to the noble Lord for continuing to raise this issue. It is very serious, and many thousands of people have difficulty selling their houses because of the existence of Japanese knotweed. We all hope the bio approach works, but it will take several years. The Government cannot deal with it; it remains with the local authorities to handle it. Can they step up their efforts and advice on the herbicide approach to tackle the problem today and fill the gap before the bio approach comes in?