I'm trying to buy tickets, why can't I select a quantity?

If you're trying to book tickets, but no quantity is showing in the drop-down box, this means that all tickets are currently reserved in baskets but haven't all been sold yet. Our baskets time out after a while, so it's always worth refreshing the page after a few minutes to see if any have come back on sale. Unfortunately though, no quantity does often mean the event is about to sell out!