Britain will surpass France and Germany to become Europe's biggest economy by 2030, according to a study.
British research group the Centre for Economics and Business Research (CEBR) predicts that Britain's output will outstrip France's by 2018 before displacing Germany by around 2030.
But it will be overtaken by India and Brazil over the same time period, said the study released yesterday.
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"If the euro were to break up, Germany's outlook would be much better," it added. "A Deutsche Mark-based Germany certainly would not be overtaken by the UK for many years if ever."
The think tank's chief executive claimed that Britain's economy would grow even faster if it left the European Union.
"My instinct is that in the short term, the impact of leaving the EU would undoubtedly be negative," Douglas McWilliams told the Daily Telegraph.
"My suspicion is that over a 15-year period, it would probably be positive.