"This Market Notice sets out details of the Bank’s temporary purchases of long-dated UK government bonds from 28 September 2022.
As set out in the accompanying press notice, in line with the Bank of England’s financial stability objective, the Bank will carry out purchases of long dated gilts in a temporary and targeted way. The purpose of these purchases is to restore orderly market conditions. "
Since September 28, the Bank of England has made temporary and targeted purchases of long-term UK government bonds in accordance with its goal of promoting financial stability. On October 10th, the Bank raised the ceiling for its daily auctions from £5 billion to £10 billion. On October 11, index-linked government bonds were added to the temporary purchase program.
https://www.bankofengland.co.uk/news/2022/october/statement-on-end-of-gilt-market-operations