Hi! Just wondered if you could advise (not for me personally, you helped me with my son's PIP application which was successful

) - a friend has been helping her neighbour and has gone to a PIP appeal which she lost. She is very disabled due to long term mental health issues and I think it's probably due to her failing to put the case properly, They have asked me to help, which I'm happy to do. I know I'll have to mug up on mental health applications (my son's issues were physical) but I can't see if it's possible to reapply or challenge a failed tribunal. She is in the process of asking for a MR for ESA, although I don't know all the details yet. Is there somewhere in the guides that'll help with getting her PIP back? Many thanks, Jan