Are disabled drivers exempt from road tax?

My wife is the registered keeper of our car, she has received adult disability benefit from September last year. How does she claim for exemption from the road tax?

Are disabled drivers exempt from paying the higher rate of VED on cars costing over £40,000?

A relative of mine has just been awarded the enhanced mobility on Personal Independence Payment. The car that he wants to buy (a Discovery Sport) isn’t available on the Motability scheme and he prefers...