Brexit Day: Britain delivers Article 50 to the EU, in pictures 29 March 2017 • 3:18pm X Icon Facebook Icon WhatsApp Icon Email Icon Save Comment speech bubble icon Britain's ambassador to the EU Sir Tim Barrow (left) delivered formal notice of the UK's intention to leave the European Union to European Council President Donald Tusk Image: 1 of 18 Credit: Emmanuel Dunard Source: AFP The letter was signed by British Prime Minister Theresa May in 10 Downing Street Image: 2 of 18 Credit: Christopher Furlong Source: Getty Images The Ambassador was seen in Brussels earlier this morning... Image: 3 of 18 Credit: Oliver Mathys Source: AP ...carrying a briefcase which it is assumed held the letter Image: 4 of 18 Credit: Virginia Mayo Source: AP Don't leave me this way... Sir Tim takes his leave after the brief meeting with Donald Tusk Image: 5 of 18 Credit: Yves Herman Source: Reuters Tusk then told Britain, "We miss you already" Image: 6 of 18 Credit: Olivier Matthys Source: AP Theresa May leaves 10 Downing Street on the way to the House of Commons... Image: 7 of 18 Credit: Kirsty Wigglesworth Source: AP ...where she announced the details to MPs Image: 8 of 18 Credit: AP Source: AP Pro-Brexit Foreign Secretary Boris Johnson arrives for today's Cabinet meeting at 10 Downing Street... Image: 9 of 18 Credit: Daniel Leal-Olivas Source: AFP ...and Brexiteer Priti Patel was beaming as she walked up Downing Street for the meeting Image: 10 of 18 Credit: Yui Mok Source: PA Liam Fox revealed back in January that Britain was holding trade negotiations with twelve countries around the world... Image: 11 of 18 Credit: Alastair Grant Source: AP ...while Environment Secretary Andrea Leadsom said that British farmers will still have access to migrant workers after Brexit Image: 12 of 18 Credit: Yui Mok Source: PA Brexit Secretary David Davies in Downing Street on Tuesday after successfully seeing the Article 50 bill through both Houses of Parliament Image: 13 of 18 Credit: Daniel Leal-Olivas Source: AFP Pro EU protesters have been demonstrating against Brexit outside the Houses of Parliament in London Image: 14 of 18 Credit: Andy Rain Source: EPA There are protests planned across the country throughout the day Image: 15 of 18 Credit: Justin Tallis Source: AFP Nigel Farage gives a television interview outside the Houses of Parliament as Brexit is formally launched... Image: 16 of 18 Credit: Justin Tallis Source: AFP/Getty Images ...and later went for a celebratory pint Image: 17 of 18 Credit: Daniel Leal-Olivas Source: AFP Nick Clegg joins demonstrators from pro-EU group Open Britain as they protest outside of the Houses of Parliament Image: 18 of 18 Credit: Justin Tallis Source: AFP/Getty Images