You can watch Tuesday's Cross Question in full again here.
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Iain Dale was joined by:
Lord (Kim) Darroch – Crossbench peer, former British Ambassador to the United States, former UK National Security Advisor and former UK Permanent Representative to the European Union.
Sophia Gaston – Head of Foreign Policy and UK Resilience at Policy Exchange think-tank.
Alex Crowley – former Political Adviser to Boris Johnson as Prime Minister, and Senior Adviser to Boris Johnson's leadership campaign.
Jo Phillips – political journalist and commentator.
Cross Question is live every Monday, Tuesday and Wednesday from 8pm. You can watch live on Global Player.