Ian
Andre has told me that he lives in Llanon and so is centrally situated in the county. He also thanks you for your response.
After I put the original query on the blog I sent Andre a couple of sites where he may find Wood Warbler and Marsh Tit, but was hoping other people may help with the other two species.
As I waffled on a bit I decided to send the info direct to Andre rather than put it on the blog.
Harry