Pictured: Chair of the Board of Trustees at the Royal Scots Dragoon Guards Museum Brigadier Mel Jameson (left) and current Colonel Brigadier David Allfrey (right) take a selfie to mark the moment as the portrait going on display.<br /> <br /> The Scottish National Gallery has unveiled details of a loan deal that will see Valentin Serov's rare portrait of Tsar Nicholas II go on display. The painting is owned by the Royal Scots Dragoon Guards Regimental Trust.<br /> <br /> © Dave Johnston / EEm
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