The Prime Minister arrived in Brazil on a trade boosting mission - opening a new digger factory amongst other things. Mr Cameron said he wants Britain to be linked to the world's fastest growing economies.
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ITV Border Political Editor Peter MacMahon says it's far too early to call this referendum.
A World War Two veteran has told ITV News he has fulfilled a boyhood dream by voting for an independent Scotland.
Keep on top of the referendum results as they are announced from 32 counting stations across Scotland.