The OECD said the UK economy may need more stimulus and a further round of quantitative easing may be necessary.
The OECD said UK growth remained flat, and is only expected to "pick up momentum" towards the end of next year. The Paris-based economic think tank forecasts that the UK economy will grow just 0.9% this year, after shrinking 0.1% in 2012.
Angel Gurría, the OECD's secretary general, said a "particularly bright spot" in the UK was employment figures.
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The European Commission president said his meeting with Prime Minister Boris Johnson in Luxembourg on Monday was ‘rather positive’.
The black cat, roughly the size of a Labrador, was spotted after 6pm in Armentières, which is 16 kilometres north-west of Lille.
The Sentry has now blamed multi-national companies, greedy for oil, for funding the fighting and profiting from it.