The federal agency began its probe -- which it dubbed "Operation Red Zone" in reference to the area between the 20-yard line and goal line for a football team's offense -- on September 1, 2012, and wrapped it up on February 6.

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Under the cease-fire, about 1, 500 Russian peacekeepers are allowed to remain inside, and can do patrols about 6 kilometers outside, the "zone of conflict, " a reference to South Ossetia and Abkhazia.

CNN: Georgia signs cease-fire agreement

In Switzerland, which like the U.K. isn't part of the euro zone, the central bank has used the euro as its external reference point in its efforts to keep the Swiss franc's value stable.

WSJ: Banks Prep for Life After Euro

Nationalists say that, regardless of comments now, it would be very much in the interests of rUK (rest of the UK) to maintain a stable currency zone, including Scotland - not least because Scotland could use the pound unilaterally, without reference to London.

BBC: Malachi Malagrowther and the Scottish banknote