Once the pre-sale starts, those links will redirect you to a page that has something like "fanclub presale" links.
I guess those links will take you to some kind of box in which you must fill in your pre-sale code. If your eligible to buy,
you will then be taken to the place where you can select your preferred ticket.
NO NEED TO PANIC, OR RUSH WHEN YOU ARE RED HILL!!!
(These are stadium gigs with 40,000 to 60,000 tickets per concert -
trust me, there is enough for everyone. Be rational about it!)
PRESALE TICKETS WILL BE AVAILLABLE ALL DAY
(remember there is also the "Wires" group that will have plenty of opportunity Thursday & Friday)
Good luck everybody, and remember you will be fine

PS: No need to panic when you are WIRES either
(These are stadium gigs with 40,000 to 60,000 tickets per concert -
trust me, there is enough for everyone. Be rational about it!)