Do I detect a suspicion that those low hours commercial pilots are also those pilots defending CAS (and ever more of it) and those commercial pilots with some proper time under their seat take a different view as to how commercial and GA can (and do) integrate

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The real problem is that the new commercial breed need rather more training and need some time outside of Europe.
I reckon six months in the States would do the trick. We could seconde a few of the ATCOs at the same time.