Good for you. You don't need to submit what you sent to the DWP previously. The DWP will have to provide a bundle which should include everything you previously sent as they have to show what they used to make the decision. If, however, there are things missing, you will have time to send them in before the Tribunal takes place.
The best of luck putting everything together.
BIS
Nothing on this board constitutes legal advice - always consult a professional about specific problems
