Just an update regarding my situation, in case someone is experience the same with uk mail.
They're not going to deliver tomorrow, they're sending my ipad back to apple (cheers!)
But apple has marked me as urgent and will send out a replacement ASAP (1-3 business days). They also marked it not to use UK mail via my request. So yeah, we'll see how this goes. I'm not particular excited anymore, after all this hassle. I will be happy once I actually have the ipad in my hands, tracking doesn't excite me anymore.