"We were hoping to reconstruct more from the victim's statement, but there wasn't enough detail given to further that ... Unfortunately we are at no further stage in terms of identifying those responsible."
The only known information about the man was he was wearing a black balaclava and a black hooded sweatshirt with a white skull-head pattern on the back. A long metal pole or bar with a hook on the end of it was used to hit the woman over her head.
Police will now revisit witnesses to check the details they have. Mr Wilson could not confirm whether the offender was known to the woman and it is still unclear whether one or two people were involved in the assault.