Regulation 12(5)(f) applies because the information requested was received by the University on terms that prevent further transmission to non-academics.I asked to see the precise language of the underlying agreements because I very much doubted that agreements specifically prohibited "further transmission to non-academics". If there were such a term in an agreement, it seemed far more likely that the term would be for "academic use" or something like that, and, given that my interest was scholarly rather than commercial, I doubted that the language of any applicable agreement would be applicable.
CRU has only managed to locate three documents pertaining to their agreements with NMSs: an application to Spain and letters from Norway and Bahrain, all from 1993-4. They also include a letter from CRU to the Met Office and, inexplicably, a copy of a current webpage from NERC governing Met Office data.