Mark
I can chip in with three notable NLE's. The first is Bramshot GC, in Fleet, Hampshire, which is just a couple of miles or so from where I live currently. By all accounts this was a very fine heather and pine course, borne out by the one photo i've seen of the par 3 10th hole, which looked really high class. The site was abandoned pre-war to make way fror the Pyestock jet engine testing facility adjacent to Farnborough aerodrome, though they preserved the 10th tee, fully maintained, as a relic within the midst of the enormous factory site. The club even used to have its own railway halt on the line between Fleet and Farnborough. There is virtually nothing left of the course now. Much of it was obliterated by the factory, which itself is shut down now and something of a monumental industrial relic. It is still possible to locate where the clubhouse was and a few of the specimen trees around the old building remain to this day. I thought I found an old tee in the middle of the woods when I was scoutnig around on my mountain bike a couple of summers ago. I believe there are some old documents in our local library which I'm going to take a look at some day. I'm very intersted in these NLE courses.
The second is Torrie House, to the west of Dunfermline, which was a James Braid designed 18-hole course, stretching to above 6,500 yards, Par 72. There was talk about 10 years ago of resurrecting this course, which was just left to grow over sometime in the 50's I think. I was invited to take a look at the site and several of the old green sites were easily identifiable, complete with grown in bunkers. A fascinating place.
The final one is Langton Hall in Leicestershire. This course was designed by Hawtree and opened for play in 1994, but it has gone again already. I remember being sent out to measure the course for the course guide, in the company of one of the most beautiful girls I have ever met! I played the course a couple of times, but there was never anybody there to collect a green fee! Only 9 holes got built and they were pretty nice by all accounts, especially the holes set in the ancient park. I'll try to add some images, when I can remember how. If you go to Google Earth and find Church Langton, you can clearly see the outline of the brown, abandoned USGA greens in the adjacent park!