Would it be worth sending NATS the link to this particular pprune topic so they can see first hand our disgruntled comments?
And I agree with Bluerobin that the author of NOTAM plot should certainly have been given a consulting role on this project, and an MBE for services to aviation whilst we're at it................
As a GA pilot with little money / time I tend not to fly for more than an hour and a half at a time. Notam plot made it easy for me to have a quick look at the local area to check that there was nothing to conflict. My initial exploration of the new site would suggest that I'm now going to have to dedicate significantly more time to my flight planning with little confidence that the results are accurate.