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Earlier this month, the Scottish court ruled the five-week suspension was "unlawful", but Lord Keen QC, for the government, said the decision was not one for the courts.

Lord Pannick QC, for campaigners against the move, said it was done to "silence" MPs in the run-up to Brexit.

The Supreme Court is hearing two appeals relating to the decision by Boris Johnson to prorogue Parliament.

So where does the power really lie? Elizabeth Glinka reports and Emily Maitlis is joined by Lord Falconer, Gisela Stuart, James Meek and John Sergeant.