Dr. Patrick Boylan:

There are a few key issues that we keep coming across. Giant hogweed is one. There have been quite a few issues on the Newry Canal and the Clanrye. We do not have any legislative remit with regard to that.

In the Foyle, one of the ones that seems to have come up in recent years is Asian clam. We are involved in monitoring programmes with parks and wildlife and the Northern Ireland Environment Agency, NIEA, in that regard. Unfortunately, when these things are in, there is often not an awful lot one can do about them other than monitor and see what the likely impact will be.