Loll
We haven't seen an ESA Claim affect a PIP one in a negative way and I would not expect this to change.
To score points for the physical section (questions 1-10) you will need to show that her problems have an underlying physical cause, so from your posts, the effects of the Vitamin D deficiency would be relevant but those caused by her Autism are unlikely to score,
In a similar way, the mental health section (11-17) cannot be the result of a physical issue.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems 
