And the third party solution gets its data from?
Oh, I understand that - however, at the moment, it's my fault if I bust a TRA that Notamplot failed to plot, so I would obviously like to see an officially supported and endorsed graphical Notam plotter. That way, while it still may be my fault, I have something of a defence
I'd hope that if Avbrief/Notamplot was clearly preferred to the AIS text-based tool, it might help persuade the CAA of the need to provide a graphical tool.