What will be the effects of Brexit on the new and used car markets?
In the short-term, not much will change.
Time will tell. Things will be clearer once the longer-term economic impacts start to take shape.
Have a look at this link for the WhatCar? view on this:
http://www.whatcar.com/news/brexit—what-does-the-eu-referendum-result-mean-for-motorists/