UK to start formal Brexit negotiations on 19 June - The Guardian

"The EU’s chief negotiator Michel Barnier has penciled in 19 June for the first formal day of talks with Britain about its withdrawal from the European Union, in what are being billed as the most important negotiations in the country’s history," wrote Daniel Boffey, the Guardian's Brussels bureau chief, in a recent article.

Key quotes:

"That highly symbolic morning, Barnier will face British Brexit secretary, David Davis, for the first day of an arduous 15 months of negotiations to hammer out the terms of the UK’s exit."

"Plans for behind-the-scenes “pre-talk talks” to discuss how the negotiations could be handled were canceled by Brussels in anger last month when Britain vetoed the shuffling of the EU budget to priority areas, such as the migration crisis."