Hi Ellie
I would contact DWP if you require an extension for your PIP. Just before Christmas they were doing it automatically as I contacted them for an extension and they informed me they had already given me one due to issues they were having with their post.
I cannot see the DWP contacting your consultant before you send in the form, how will they know who to contact? It is quite rare for DWP to contact doctors/consultants.
Gary
Nothing on this board constitutes legal advice - always consult a professional about specific problems