Published paper is in RQF external hard drive pt.sta 17/2/09 . Yellow in Sherpa: author can archive pre-print (ie pre-refereeing), subject to Restrictions below, author can archive post-print (ie final draft post-refereeing) Restrictions: 12 months embargo, author cannot archive publisher's version/PDF, e-mail sent to Con, 27.6.12-MMM. Author (Con) doesn't have the required copies, 28.6.12-MMM. Supporting documentation added to dark upload - HD 14/11/17