"Were dysfunction in this market to continue or worsen, there would be a material risk to UK financial stability," the central bank said in a statement that immediately eased pressures on soaring British government bond yields.
The Bank of England said on Monday it would not hesitate to raise interest rates and was monitoring markets "very closely".
Earlier on Wednesday 30-year British government bond yields rose above 5% for the first time since 2002.
"An irresponsible, destructive fiscal policy."
In his remarks on Tuesday, BoE Chief Economist Pill said financial market upheaval would have a big impact on the economy and would be factored into the Bank's next forecasts.