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Can the EU afford to put in place more aggressive economic sanctions against Russia? And why has the EU been more hesitant than the US in implementing effective economic sanctions? James Nixey, head of the Russia and Eurasia program at Chatham House in London, gives us his view. Also, we speak to Ashish Thakkar, the man said to be Africa's youngest billionaire, as he embarks on a buying spree of African banks and financial services in a joint venture with Bob Diamond, the former CEO of Barclays. And Lucy Kellaway of the Financial Times tells us how to leave work gracefully when you go on holiday, without promising to answer any work-related emails.