What happens now that Britain has triggered Article 50?

Article source
The Economist

Theresa May, the British prime minister, has triggered Article 50, the legal method by which a country leaves the European Union. The bill giving her the constitutional authority to do so had become law on March 16th. Under Article 50’s terms, any country invoking it automatically leaves the EU after two years, unless the other 27 unanimously agree to extend that deadline. Yet this is but a first step in a negotiating process that is likely to take longer than two years to complete in detail. The invocation of Article 50 does not even guarantee that there will be a deal between Britain and the rest of the EU: it merely initiates negotiations. Please click here to continue reading this article.