I tried to use it yesterday for a trip to the MIdlands today. I couldn't get it to work so I rang NATS and they were extremely helpful. They answered the phone immediately and spent some time trying to get it to work. Eventually they rang me back and then helped me to get it to work. (60% of resultant NOTAMS were irrelevant for my flight as others have found).
The only justification he could offer for this poor system was that it was free
Does this mean that they will charge for it when it works better?