My late Mother suffered with Parkinson's apparently " Someone certified with a permanent condition affecting their intelligence & social functioning is disregarded for council tax purposes in England, Scotland & Wales".
I have written to my local Council & had this confirmed in writing, I have now begun the process to reclaim the tax. I was unaware of this & wanted other carers to be made aware. I have posted a link from the Money Saving Expert web site below
www.moneysavingexpert.com/news/reclaim/2016/09/lived-with-someone-with-alzheimers-parkinsons-or-a-similar-illness-you-may-be-able-to-reclaim-1000s-in-council-tax