[bongodriver]

Originally Posted by Crumpp

Not when Operating Notes are full of symptoms of instability, the test pilots continue to report the symptoms of instability, the pilot anecdotes convey the symptoms of instability, and an independent aeronautical research organization confirms the issue.

Oh yeah, the engineering solution to the issue was also enacted AFTER the Battle of Britain:

No, I don't think it is stretching feasibility at all.

It is one of the facts that helped Gates to win the adoption of stability and control standards in the UK during the post war period.

Operating notes with a 'few' refferences to instability much like many other types of the era you mean.
pilot annecdotes are acceptable now then?....but just not the ones with anything positive to say on the Spit?
and NACA independently tested a MkV which is a totally different aircraft in terms of weight and balance.