Does the PM have to ask Parliament before committing Britain to military action overseas? (R)
How the new retail sector of flash sales is changing the way we shop for luxury brands.
Dr Lucie Green investigates the news in science and science in the news. (R)
Melvyn Bragg and his guests discuss the Haitian Revolution of 1791-1804. (R)
Sean Curran reports from Westminster.
Neil MacGregor focuses on the long tradition of German metalwork, from clocks to cars. (R)
BBC Radio 4 joins the BBC World Service.
The latest news about food, farming and the countryside. Presented by Charlotte Smith.
Miranda Krestovnikoff presents the Arctic specialist, the king eider duck.
Susan Hulme reports from Westminster.