Article 50 live: Merkel rejects UK demand for parallel talks: Article 50 trigger day key points
PM's Article 50 notification letter is delivered to European Council President Donald Tusk in Brussels
Theresa May tells MPs in the Commons: "This is an historic moment from which there can be no turning back."
Angela Merkel rejects UK demand for parallel talks on exiting the union and a trade deal
Sky Data poll finds half of Britons happy about EU divorce process starting
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