International calls while roaming with postpaid

I will be in the UK for the next week and I have a no contract postpaid account.  Based on the new roaming policies, I have a couple of questions.  I have looked, but I did not see documentation providing a clear answer to these 2 situations, so I would appreciate an answer from someone who knows.

1. What will I be charged per minute if someone calls my mobile number from the UK while I am in the UK?

2. What will I be charged if I call someone in the UK while I am in the UK?

Thanks