Yellow in Sherpa: Author's Pre-print:   author can archive pre-print (ie pre-refereeing)  Author's Post-print:   subject to Restrictions below, author can archive post-print (ie final draft post-refereeing)  Restrictions: •12 months embargo for scientific, technical or medical journals •2 years embargo for social sciences and humanities journals  Publisher's Version/PDF:   author cannot archive publisher's version/PDF LL 8.4.14 & 20.8.14-MMM, Requested (James) Accepted v. & Permission, 20.8.14-MMM, Received on-line first version, requested again explaining version, 3.9.14-MMM