By Jack Barnett A historic hit to Brits’ living standards from roaring inflation and rising interest rates has thrown the UK economy on course to stagnation, the world’s lender of last resort warned today. The UK economy will grow a better than expected 3.6 per cent this year, according to the International Monetary Fund’s (IMF) latest World Economic Outlook out today. But, growth will stall next year as households bear the brunt of rising prices and higher borrowing costs. The economy is set to expand just 0.3 per cent next year, lower than the IMF’s previous 0.5 per cent estimate. Just Germa…