Since 2009, Britain has experienced very sluggish growth i.e below 1 per cent, or negative growth in a single quarter, but not for 2 quarters. Effectively, Britain has been bumping along at the bottom of the growth graph, sometimes recording growth, sometimes not, for nearly four years. In other words, an economy in recession mode with little prospect of any kind recovery. Hardly surprisng, the rest of the world is also in recession.
So what's the answer? Time. Economic levers take 2 years to filter through the entire system. The impact of the emergency Budget of 2010 are only now impacting the entire economy. You will note that Sterling has become the safe haven for international trade. You will also note that the Eurozone is still in trouble, although German Euros are also considered a safe haven. Germany recorded 0.8 growth in the last quarter which is good, but still below 1 per cent - so still in recession mode.
The 2010 Budget target was growth by 2013, now put back to 2017 for a fairly obvious reason - if more than 40 per cent of your exports go to the Eurozone, as they do from Britain, then the Eurozone has to get its house in order quickly to stimulate growth. It'ss as simple as that.