The UK economy is set to grow by just 0.7 per cent this year, according to the latest forecast from the National Institute of Economic and Social Research (NIESR). The forecast is well below that of the Chancellor\'s official budget watchdog, the Office for Budget Responsibility, which sees growth of 1.2 per cent in 2013. For 2014 NIESR predicts growth of 1.5 per cent, versus the OBR forecast of a 2 per cent expansion, reported The Independent newspaper on Tuesday. The think tank urged the Chancellor to adopt a new fiscal strategy to pep up the economy. \"It remains our view that such a recovery would best be supported by a significant increase in public sector net investment, with looser fiscal policy in the short term while demand remains weak,\" it said.