Your reaction to Lady Persie's death?

Well, Persie was supposed to be arrested and send to a prison camp for Nazi collaborateos later on the same day she killed herself. She ruined her relationship with Agnes and Hallam definitely would not take her again as he wants to be reconciled with his wife. On the top of it, she shot Beryl, the fiancee of her former lover (Spargo).

So everyone's pretty much hated her at this point and she knew that she'll be jailed for the rest of her life for both her spying and the attempted murder of Beryl. Knowing that her life's pretty much over, she decided to end it by jumping from the balcony.

I agree that Persie's a very interesting character in UD, probably the one character that saved the show from being totally sucks (Blanche was the other one). I wish the show runners could've explored the backstory of her character and explain to us why she became the evil person that she was. I assume the fact that she's the younger daughter who didn't get much attention from her parents (unlike Agnes) and being the daughter of an impoverished earl who was supposed to lord over everyone else but actually had no money were the reasons she was attracted to fascism and became the evil home-wrecker she's known for. But since the show's not renewed, there's no opportunity to explore her character further now :-(.