SNP Ministers are refusing to make public a secret dossier drawn up to identify the risks to Scotland of the independence referendum.
The decision to block release of the internal "risk register" on the 2014 poll means voters will not be able to find out the potential hazards flagged up by Scottish Government civil servants.
The refusal to publish – which Labour has put down to the SNP's "secrecy obsession" – will now be investigated by the country's Information tsar.
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