It can be found via these links and also on Cumulus website Publications.

http://www.cumulusnottingham2016.org/wp-content/uploads/2015/08/OS919_Cumulus_publication_Final_260117.pdf

or Cumulus_Nottingham proceedings In this place 2016 PDF

http://www.cumulusnottingham2016.org/about/

http://www.cumulusnottingham2016.org/call-for-papers/