LONDON (AFX) - Chancellor Gordon Brown has ordered the Treasury to begin assessing his five economic tests for adopting the euro, a move that will prompt speculation of an impending referendum on the controversial issue, the Daily Telegraph reported without naming its sources. However, the paper said that officials involved in the assessment believed that, far from gearing up for a referendum on the single currency, Brown was aiming to put the issue on hold. One unnamed official told the Telegraph that the depth of the research being done means that "almost any answer may be found in the results". Brown has said the tests must yield "a clear and unambiguous case" for joining the euro. The official told the Telegraph this was a very high threshold and that the inconclusive answers would allow him to say the referendum should be put on hold for the moment.