It's day two of a legal appeal at the UK's Supreme Court, over how Brexit must be authorised.
The Government is arguing against a High Court decision last month which found that Article 50 of the Lisbon Treaty - which would begin Brexit negotiations - had to be triggered by a vote in Parliament, and not by the Prime Minster.
Our UK Correspondent Natalie Powell reports…
IN:The landmark
OUT: SOC
DUR: 31 seconds
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