Hi Twinks - really sorry to hear of your problems with the DVLA.
I had my license rescinded in September 2014 (DESPITE passing an experienced driver assessment in the March which I paid for myself in anticipation of them asking me to take one!)
I feel I was always a fairly competent driver and, living in the sticks, was very put out to have it taken away - not least as it made working for myself impossible - and I don't know on what data they based their decision on (apart from that old chestnut of a question "Do you suffer from freezing?" to which I had replied "Yes, but only when walking").
As I have previously posted, I was eventually offered another assessment at one of their own designated centres but the date I was given was about a week before i was due to have DBS surgery.
I phoned the DVLA to ask their advice and they told me to re-apply six weeks after I'd had my op and that I SHOULD get priority but, actually, when I did re-apply, I was plonked at the back of the queue as they started the whole process over again!
As we live in West Sussex, I originally went to a neurologist in Chichester, but, once I had been referred to the John Radcliffe Hospital in Oxford (where I had my DBS), all my neurological appointments were based there as well. I informed the DVLA of this and, sure enough, on 7th November (2015), I received a letter saying that they had sent a questionnaire to my neurologist at the JR and I should allow 6 weeks for a reply.
Knowing that my neuro there was very prompt in replying to anything to do with the DVLA, I rang DVLA as soon as the six weeks was up, only to be told they hadn't received a reply from my neuro yet.
So I rang the JR and was told the questionnaire had ONLY JUST arrived and that it would be dealt with forthwith.
After a couple of days, someone from the JR Neuro Dept phoned me to say that the reply had now been sent. I waited for another couple of days then rang DVLA and was informed that they had, indeed, received a reply and could therefore go onto the next stage. I assumed this meant an assessment was being arranged and, when a letter came through from the DVLA a couple of days later, I tore it open with excitement..... only to read that they had sent a questionnaire to my neurologist in Chichester and that I could expect a wait of six weeks for a reply!!!
I couldn't believe it - I was soooo angry!! I immediately phoned them up and asked what was the point of them sending an enquiry to someone I hadn't seen for about 15 months when they had already got the info back from the JR? The assistant I spoke to was quite apologetic and promised that she would tell the medical team to move to the next stage!
.....I await with baited breath......!!