[JAS84]

I'd imagine the UK filmed ones would need to air first? After all, it's unlikely to go unnoticed that the studio is different. Use them first and it'll look to Australians like they just tweaked the set after recording that first batch. I can't see them not airing at all - they wouldn't have needed to do TEN pilot episodes, you only need one to make sure the presenter can do his job, and to test out that endgame change. I can't imagine what they could have changed it to though. Brekkie, that ad you mentioned isn't on Youtube is it?

And how is two Chasers on the normal Chase format going to work? When the UK one has used multiple Chasers on things like Christmas specials, they'd had one face each contestant and then one do the Final Chase, allowing them to use all five Chasers in the same show (this was before Darragh "the Menace" Ennis debuted). The only time we see two together is on Beat the Chasers.