OK, so I clearly have too much time on my hands (not true sadly).
I have started work on a Google Map of Trout Fisheries in the UK. It currently covers only the South of England however it's a work in progress. It is based mostly on sites found online and so may well be inacurate, if you spot anything erroneous please let me know.
Why bother? Well, I'm hoping to find it useful when holidaying in the UK but also since I started fly fishing you've been a hugely helpful bunch so I'm hoping to "put something back in" and I hope that others will find it useful too.
Here it is:
http://maps.google.co.uk/maps/ms?hl=...cf8389da8a4afd
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Better still, you can now use
http://www.theflyfishersmap.co.uk
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As I said it is VERY much a work in progress.