Poldark: A Third Season?

I am pleased that BBC's historical tale Poldark has been renewed for a third season. I'm just wondering when we all get to see the second season. 

Ross Poldark (played my Adian Turner who you may remember from the BBC's Being Human) is a British soldier returning from the American colonial wars  only to find his inheritance has been squandered. By the end of season one, he finds himself married below his station but nonetheless happy as he attempts to save his mine and workers from ruin.

Season two should appear on BBC and Masterpiece later this year. That gives everyone time to catch up on this superb series.