The following link provides a report and photos of this unusual version of the Hawker Hurricane developed by Hillson:
http://aviacaoemfloripa.blogspot.com.br/2011/02/um-hurricane-biplano.html
Hope you enjoy and I count on your visit!
Another site about the concept
http://www.biplaneforum.com/The-Interesting-Hillson-FH40-Slip-Wing-Hawker-Hurricane.html
