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We examine the three things you need to know about the Greek crisis but were too afraid to ask. Top economists, Dr Paola Subacchi of Chatham House and former UK government adviser Vicky Pryce, also ponder the things we still don't know, as the sense of uncertainty spreads across financial markets.

Amidst all the fear, John Grout, Policy and Technical Director at Britain's Association of Corporate Treasurers, offers some practical advice to businesses - wherever they may be - whose trade depends on the eurozone. How should they prepare for a possible break-up of the single European currency, and what are the most immediate risks they are likely to face from their clients and trading partners?

And our regular commentator, Lucy Kellaway of the Financial Times, explains how the saving of rubber bands might just save a British corporate giant - The Royal Mail.