The Daily Telegraph leads with an imitation of the letter that Theresa May sent to European Council President Donald Tusk triggering Article 50, defining it a "magnificent moment".
The Times picks up on Theresa May’s view that security and trade are part of the same package of negotiations, labelling it a "threat to EU terror pact".
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Leading with how the EU perceived May’s words, The Guardian reports on the feathers ruffled in Brussels, with senior officials warning against being "blackmailed", while the Daily Mirror runs with German Chancellor Angela Merkel’s rejection of early trade talks.
Both The Independent and the Daily Express focus on May’s words that there can be "no turning back".
The significance of the day is not lost on the i, which conveys a remorseful message in scribing ‘Goodbye’ in several European languages. It reports on Tusk’s words that "[Europe] misses you already".
Meanwhile, The Sun leads with the funeral of George Michael.