I had a very good report from an occupational health consultant years ago - I actually had to see him because work wanted an independent opinion, which employers often do before they terminate your employment. His report was thorough, and in essence he said I was screwed - no chance of recovery in the foreseeable future etc. Depressing reading it, but I thought it would help my claim for ESA, especially being independent and him being very high up...it didn't though. My experience with the DWP is that they don't take a blind bit of notice of what any doctor says other than their own. Sure, they'll take a photocopy and attach it to your file but they don't consider it when making the decision. Where it can be helpful is in your appeal tribunal, so worth doing, just bare in mind that's probably where you will end up still.