It's a young woman from Emmerdale, not really watched it to know who she is.
To be honest, I'm going to miss Karen Gillan, she's hard to replace. Also the article mentions details about the new series which has begun production. 14 episodes over two years. So I'm guessing there will quite a break unless they are going with an autumn 2012 start and continue early spring 2013. I'm pretty sure there was going to be some specials planned for this year also before the new series.
So there you have it.