PIP assessment

Wookie66

Hi had a letter today from Capita saying that my Pip assessment will done over the phone on 21st of this month. Is this a good thing or a bad thing regarding the outcome of the assessment, and is there anything i should be forewarned about, before having a phone assessment 
 My medical problems have gotten worse since i first sent in the forms. I am now being referred to specialist for full spinal scans, physio, etc, but the resulting evidence will not be ready to put forward to them before my assessment date. Any advice would be most welcome

Wookie66

Thanks to everyone who responding to my questions. much appreciated