[James2001]

According to DS, the iPlayer will have more than 2,000 episodes available by Christmas, which will be well over a quarter of the show's entire run:

www.digitalspy.com 

Though apart from the addition of 2012 episodes to the 2008-2011 ones already on there, it doesn't say what those episodes will be. A selection of episodes from across the show's run, something similar to the 2008-2012 episodes from another point in the show's run? Will be interesting to see.

And at least the episodes on there won't be plagued by the continuing technical issues of the Drama repeats...