I'm not really surprised they canned the public days, they've been stretching to fill them for years now.
As others have commented, the trend has been clear for a while now.
Recalling a trade day 2006, it was rather dull, although the public were indeed present one sensed there was the beginnings of what ultimately transpired: More a trade show than anything else.
Heading out the gate, the old familiar sound of a Merlin engine, then another as a Spitfire and Hurricane were echelon left..
Perhaps Duxford!