We want to make sure that as many fans as possible have the chance to book a ticket when a show goes on sale. When you select your seats, those tickets are being held while you go through the checkout process, so no other fan can access them.
We have to limit the amount of time you can hold the tickets otherwise someone might select some tickets, go and make a cup of tea, then decide a few hours later they don't want them anymore. This wouldn't be very fair to the fans who desperately want tickets and are ready to buy them but can't get their hands on any.
The amount of time you have can vary depending on how busy the website is, but we'll always make sure there's more than enough time for you to fill in your details and check the information carefully before paying for your tickets.