Australia's prime minister has warned that an independent Scotland would not be in the best interests of the international community.
Tony Abbott, elected the Commonwealth country's 28th prime minister last year, became the latest international leader to wade into the debate after US president Barack Obama said his administration had a "deep interest" in ensuring the United Kingdom remained united.
Mr Abbott, who spent two years at the University of Oxford, told the Times: "What the Scots do is a matter for the Scots and not for a moment do I presume to tell Scottish voters which way they should vote.
"But as a friend of Britain, as an observer from afar, it's hard to see how the world would be helped by an independent Scotland.
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First Minister Nicola Sturgeon is seeking to make a statement later today on 'the way forward for Scotland after the General Election'.
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The world's first ever 'hole in the wall' was installed in Enfield, north London, on June 27 1967.