Firstly, welcome to APAT Mr Donk, I"m sure you"re going to enjoy the roller coaster ride that is APAT.
In season 2 there were 3 methods of getting your hands on a seat at a National:-
1 Qualifying via a live Regional event
2 Qualifying via an online satelite, and
3 Buying in directly via a website link
Although we don"t have details of season 3 yet, and the various events, the methods of season 2 (or similar) are likely to be in place for season 3.
The buy in via the website (or the "clickfest" as it"s known) is a manic affair where fast typing fingers are the order of the day
These seats generally sell out within a few minutes, but it"s a case of keying debit card details, plus your name and address etc, into the form displayed.
You would then sit with your fingers crossed for the next hour whilst Des updates the site with the names of the fortunate few.
I"d advise you to come back to the forum regularly over the next 3 or 4 weeks. More details and, hopefully, a full schedule for season 3 should be displayed here, in that time.
Ian