Carole Walker sits in for Matt Chorley. She discusses how can the West break the naval blockade of Ukrainian ports? With the Times' Defence Editor Larisa Brown, Chair of Ukraine's biggest grain producer Dr John Rich, Chris Southworth, the General Secretary for The International Chamber of Commerce and Professor of War and Strategy Dr Alessio Palatano.

PLUS: Manveen Rana and Alex Massie discuss 70's blackouts, immigration and the SNP.

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