In a statement this morning, Threadneedle Street said the rate at which it is buying long-term government bonds will be ramped up from £5bn per day to £10bn per day.
The Bank has been purchasing the gilts using newly created money in a process known as quantitative easing.
On Monday Threadneedle Street also said it would also launch a "Temporary Expanded Collateral Repo Facility", aimed at providing liquidity to banks whose clients are struggling with sudden cash calls. That will continue beyond Friday.
The Bank first announced the bond-buying scheme on September 28 in a bid to calm market "dysfunction" following Chancellor Kwasi Kwarteng's mini-Budget, which spooked investors and sent pension funds and gilt markets into a "doom-lop" of selling.
The crisis centred on so-called liability driven investment (LDI) funds, which pension schemes use to shield themselves against adverse moves in inflation and help match their liabilities with their assets.