This article performed by the University of Bristol; http://www.bristol.ac.uk/sps/people/marianne-hester/pub/9852445 http://www.nr-foundation.org.uk/downloads/Who-Does-What-to-Whom.pdf seems to disagree.
In it's conclusion it includes this statement:
A vastly greater number of incidents were attributed to men, as
either sole or dual perpetrators.
However I've found multiple uses of the term "Gender Symmetry" which means to say that actually there are an even number of female and male perpetrators. http://vaw.sagepub.com/content/8/11/1332.short http://vaw.sagepub.com/content/12/11/1003.short
It seems to me that perhaps there is a bit of ambiguousness. There seems to be multiple studies supporting gender symmetry in abuse but then multiple studies that show the majority of abusers to be male.