THE reader day out at Birdworld in Surrey planned for June 22 brings back all kinds of memories for me! My association with Birdworld goes back to its very beginning. When I was a travelling salesman for a builders merchant, Birdworld was part of my area. Although I initially visited as a member of the public (it was the same with Birdland in Bourton-on-the-Water - and others), I came to know the owners very well. They were Roy and Pat Harvey, and their son