Someone calling jobcentreplus on your behalf

Hi, am expecting a dreaded letter about a wfi.

My mental health professional will attend an appt. with me if I have to have one.

But the MHP is going to ring on my behalf to see if

A) it can be delayed due to me appealing (wrag to support)

or if not

so they can book a time when they are available to go with me

My question is - do I have to be in the room at the same time to give my permission or can the MHP ring at any time and be allowed to speak about it on my behalf?

Thanks

Thank you Gordon.