Regardless of when they were due to fly, being caught four sheets to the wind, in a public place by the local plod, is probably what sealed their fate.
I'm sure they will reflect ruefully on that, and will learn from it. But I hope they get treated wisely and no differently than the hundreds of aircrew and groundcrew who have got hammered in similar circumstances before them. I hope that they get a measure of protection from the RAF too, and if there was no threat to ops or flight safety, then that point is hammered home.
It possibly won't reflect too well on personal judgement, but I hope their professional abilities remain appropriately intact. A said earlier, their greatest crime could possibly have been one of getting caught. I certainly am the last person to cluck at anyone getting hammered overseas when younger..