The UK needs to ditch its plan to cut taxes and instead hike interest rates immediately, Mohamed El-Erian said.
Though aggressive rate hikes could cause a recession, the UK is past the point of hoping for a soft-landing, he warned.
While the central bank averted an immediate financial crisis with its intervention, that's the opposite of what it should be doing to lower inflation, El-Erian warned.
What we need is for the tax reductions to be withdrawn, we need the Bank of England to act on interest rates," El-Erian said in an interview with BBC on Wednesday.
"Without [tax cuts], I would look to the Bank of England to make incredible increases in interest rates and I would accept a much deeper recession," he added.