Brexit: All you need to know about the UK leaving the EU

Thanks to the BBC
http://www.bbc.co.uk/news/uk-politics-32810887

Brexit: What is the EU customs union and why should people care that the UK is leaving it?

A nice summary from the Independent
http://www.independent.co.uk/news/business/news/brexit-latest-news-what-is-eu-customs-union-why-care-if-uk-leaves-it-european-union-deal-a7529361.html