Name of a bbc drama ?

Hi tv watchers, I have been trying to remember a name of a dram Series that U haven't had the chance to finish, quite sure it was broad-casted on bbc but cant be certain,it was based on a victorian story of a writer who was married but his wife was unwell, also was molested by her dr, he met a prostitute who had a skin problem and loved writing, she then moved in with him in a house he got especially for her, to stop being a prostitute, she then wanted to see where he lived and as she was looking the wife saw her but she thought she was an angel who was sent to save her... please guys I want to c the end of this drama, does anyone knows what i am talking about.thank u.