Thanks to my friend, Chris on Twitter, who pointed this out to me. =)
She just checked Martin in at London's Heathrow Airport a couple of hours ago. I'm currently trying to contact her and confirm this check-in. According to the search I did online, all reports are saying the trio of Simon, Nick and Edgar will be attending the Melbourne premiere. So I guess Martin's not going to be there. But back home with his Amanda. Yup.