As far as I understand, any player who shows up as NOIR after the final rankings have been calculated will not be contacted for an invitation. Instead, the invitation will just pass down to the next person in the ranking.
The number 1 Senior is Tord R. He showed up in the rankings until about a month ago, then he suddenly changed to NOIR. My guess is that he changed himself to NOIR in his My Pokemon account, though I cannot say why. He'll then change back to in the rankings soon, I presume?
The Junior GB player on 1704.44 definitely has a chance at an invite if he creates a Pokemon account. If anyone knows who that is, you can just get his parents to sign the POP form and fax/email it to POP, and they're usually really fast with creating the account. (I scanned and emailed to form of Minde B. two weeks ago, and two days later he was in the rankings).
And i have a question the players who win an ranking invite. they become any informations from PUI?
The players who have the invite from Nationals already have all their forms and stuff. My guess is that they'll calculate the final rankings as soon as possible after UK Nationals are concluded. Then they get published on the POP website, and then you get your paperwork.
I'm in the same situation as you, already booked the flight and the Hilton, now I'm just crossing my fingers for an invitation