Probably about 2 -3pm your time.

We is Australia get the updates around midnight Thursday 1 am Friday so your 10 hours behind us,but get updated at the same time ,we download off the UK PStore for this one [well redirected to be technical].

I think the update probably contains the game, buying the game will just download a key to unlock it, so it should be quick.

But then again this is SONY so I could be wrong.