Just one point concerning......
validity period to be 12 hours
I tend to plan my flights the evening before say at 8pm. I check NOTAMS and then leave final wx check + winds aloft until the next morning. It would be nice to have a bulletin that would cover the whole of the next day i.e. 24 hours as the 12 hours would only take me to 8am.
I notice the NATS operational covers 48 hours, the one I looked at this evening did at any rate.
Lastly, I agree that geographic then type filtering is the best way.
Cheers
Barney
P.S. I assume that I should not have to check the NOTAMS again directly before stepping in the cockpit if my flight is and was covered by the period of the NOTAM I initially looked at?