I tend to think that Boris Johnson is right about Heathrow, and that Gatwick would be a better bet.
But letting Ministers off collective responsibility is a sign of Prime Ministerial weakness, of being Harold Wilson in 1975 rather than 10 years earlier.
Of being, in a word, David Cameron.
Theresa May has already had to slap down Johnson over Syria.
Any other Prime Minister would have sacked any other Foreign Secretary for having made that necessary.