Francis
Providing you meet all of the deadlines, your DLA will remain in payment until four weeks after a Decision on your PIP claim is made.
You have the option of including evidence from your previous DLA claims as part of the assessment, our advice is most certainly not that you should not do this!
You need to decide whether including this information is to your advantage or not,
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems