How should companies respond to a Trump Twitter attack? It's a modern twist on a strategy known as "jawboning" - where politicians try to use their platform to influence the private sector. The American law firm Cleary Gottlieb has drawn up a guide for companies on how to respond to social media attacks. We speak to one of the firm's partners. Also in this programme:
South Africa uncovers a fresh rate-rigging scandal: we'll dig into what's gone wrong in the five-trillion dollar foreign exchange market.
And a stitch just in time - the lingerie brands that are stepping in to rescue a traditional French lacemaker.