I am in the process of trying to renew my license, the second over 70 renewal.
I have Parkinson's and the DVLA doctor has to communicate with my GP and Neurology Consultant, my license has run out and I now drive under a section 88 rule until all is sorted and I get the renewal or the license is revoked.
No charges other than postage stamps to return the forms sent to me by the DVLA.