By Jack Barnett The UK economy would be 24 per cent bigger had the global financial and Covid-19 crises not happened, a Wall Street bank has said. “A series of unfortunate events and policy choices have cut UK potential growth” over the last decade or so, Bank of America said in a note to clients. Since the financial crisis in 2008, Britain has undergone a sharp slowdown in economic growth, mainly driven by awful productivity improvements. This has left households struggling to absorb the current cost of living crisis, with their capacity to maintain spending squeezed by inflation reaching a 4…