There's a book which I recently bought called The Verbally Abusive Relationship by Patricia Evans which I can't recommend highly enough. It goes into exactly the things mentioned in this thread, with explanations as to why some people behave in this way and methods of stopping the abuse if possible. Also says if you feel you are in physical danger you should leave immediately.
The book is positive and supportive and it might help just having it there to refer to.
To think that London, or anywhere else for that matter, does not belong to any one demographic
What Would You Do in this Position?