If I'm not totally wrong the date for Vienna stood in an Austrian newspaper.

And because of London, is it really a ticket broker? I'm not from England you know and I don't know what a ticket broker is and what a reliable Ticket office. Here in Germany all ticket sales that stand in phonebooks or something are reliable. I never heard of Ticketbrokers with a homepage and an office here in Germany. I heard of them for the first time when I was in London this year.

But you are right of course, noone should book flights and stuff before someone has the tickets in their hands.