Brakers
There's no harm in you including the Tribunal's Decision with your current claim, but as it is from 2012 you will need to explain in detail why it is still relevant to your conditions as they are now.
Please make sure that you use the latest ESA claim guides, there have been changes to the Regulations, Descriptors and Guidance since you were last assessed
www.benefitsandwork.co.uk/help-for-claimants/esa1 Gordon