14. The original handout created by Dr Trevor Bryant (University of Southampton) and found using the Xpert repository is available at http://www.edshare.soton.ac.uk/5135/ The adapted handout re-purposed by Dr Richard Field (University of Nottingham) is available at http://resources.jorum.ac.uk/xmlui/handle/123456789/11915 …………… ..with a request for others to add to the case