Before starting to allocate prizes, list the winners - I imagine there may be a few takers for the marquee and not everyone is able to sit through a video at work to see if they were lucky or not...
I can't answer for Ian, but in my opinion yes, it should be. Which is why I suggested waiting until the list of winners is announced before people claiming prizes.
But I'm not the organiser (and I have no claim to a prize) so I shall stay out of it