I'm with you on those, Nick! The first is ambiguous, the second a definite wood white and the third probably Réal's, though it's not as clear cut as the one I think you photographed near Geneva on the first day, Nick. In my opinion you can only be really confident when you see extreme examples from one end of the spectrum or the other.
Both Yves Gonseth (the former Swiss recorder) and I got 100% on a blind test of 7 known individuals last year, caught and prepared by Yannick, the present recorder (he didn't kill them
for this blind test, but as part of his job, determining the status of
reali in Switzerland, and I asked him to set up the test in the hope that we might be able to do away with the killing bit in future!). It's not statistically very significant, but it does suggest there's something in the method. I applied a different method that I had invented myself to the same 7 individuals and found it agreed with 6 of them but delivered the wrong result in one case.
See here:
http://www.pieris.ch/diagnostik/s_reali_01.html
Guy