"It'll be a British style game and it's not the unknown quantity we could have had, " he added.

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Rangers, in pot two, could have faced any of the English clubs but appear to have been handed a relatively favourable draw that includes the unknown quantity of Unirea Urziceni.

BBC: British clubs avoid Euro giants

They have a tough group with the world champions - and in my opinion the best team in the world - Brazil, a brave and physical Norwegian side and the unknown quantity of Morocco.

BBC: Confidence is key for Scotland

The process also uncovered a previously unknown quantity of paintings of Dundee, where the artist was born and raised.

BBC: Vincent Rattray

But the risks of choosing such an unknown quantity are enormous.

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Mr Hollande is something of an unknown quantity in Washington, although the White House sent a team to Paris last week to get to know his closest advisers.

BBC: Monsieur Hollande: Obama's new friend

But in some key repertoire for the Philharmonic, Bruckner and Schumann for instance, he is an unknown quantity.

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