DLA to PIP transfer - paper based

A family member ( A ) is being transferred from DLA to PIP.

Another family member ( B ) who was due to take A for the assessment, apparently intercepted the process had the appointment cancelled for unknown reasons and claims the agency dealing with A's transfer is looking at doing a paper based assessment I did not think this was even possible when transferring from DLA. I'm not sure how B achieved this as I thought DWP / outsourced agencies can only speak to the claimant directly (or with claimant agreement in person) and B is not an appointed advocate.

I received a concerned/distressed call from A, who seemed confused by what was going on. B is extremely hostile and is dictating what happens and will not take input.

For the sake of A wellbeing, I would like to know is if it's in A's best interests to have the paper based assessment. A suffers from extreme anxieties, but would no doubt attend an assessment if that's the best course of action. A recently attended an ESA WCA.

Presumably since one appointment has been cancelled it would be imperative to attend a second appointment should one be scheduled.

Thank you.

Thanks BIS