"only one union in Denmark"..
Is that because the Danish pilots prey on others, earn 30% more than the others and go on illegal strikes every 6 months to get what they want?!
So watever you guys do, dont ever let yourselves be bought by a Danish-run carrier, they will take youre job and salary with no hesitation at all.
As a group they simply seem to completely lack moral and empathy. (Sorry, does off course not apply to the few great Danish colleagues I do know exist.)