Beta Region Selection

I live in Canada but have a UK PSN account, so when I'm selecting my region do I need to pick Europe or Americas? Or does it not matter? As long as I can download and play the beta then I don't mind which region I'm in!

Any help/advice appreciated.

UK PSN account is Europe, European PSN won't accept the Americas code and viceversa.

I'm Australian and used the EU code. It worked. Unless that's normal, I don't know. Anyone shed some light?