Uh oh.

Steve McIntyre has written an eviscerating essay about a secret letter circulated by the IPCC to UEA/CRU, which they are refusing to divulge, because:

there would be an adverse effect on international relations between IPCC WG1 and academic institutions within the United Kingdom because it would force is to reconsider our working arrangements with those experts who have been selected for an active role in WG1 AR5 from your institution and others in the UK”.