Dope spine
The Tribunal Service is independent of the DWP and will look at your claim from scratch, I can't say that they are sympathetic, they are not allowed to show bias, but they will treat your evidence as being equal with that provided by the DWP.
AS to other benefits, if you are unable to work then you should be able to claim ESA, you will need your GP to issue a Fit Note to say that you are unfit for work. Have a look at our ESA Claim guides for information about ESA and an understanding of the criteria that you will need to meet for an award.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems