Where every figure came from
Bank of England Database, sterling reserve balance liabilities, monthly average (LPMBL22) (Banks' reserves at the Bank, and the episode chart): https://www.bankofengland.co.uk/boeapps/database/. Open Government Licence v3.0 (not an exchange-rate series). Retrieved 1 October 2026, monthly to August 2026. Monthly averages of Wednesday amounts outstanding, GBP millions: January 2022 976,913 (the highest from January 2019 to August 2026); November 2022 951,418; August 2025 671,099; September 2025 659,537; then between 640,661 and 657,627 each month to August 2026; August 2026 640,661 (about GBP641 billion). Chart: January 2020 to August 2026, in GBP billions to one decimal place.
Bank of England Database, ten-year British government securities nominal par yield, monthly average (IUMAMNPY) (Ten-year gilt yields in August 2026): https://www.bankofengland.co.uk/boeapps/database/. Open Government Licence v3.0. Retrieved 1 October 2026. August 2026: 4.9886 per cent (about 5 per cent). For comparison, August 2019: 0.5776 per cent (monthly average; the Resolution Foundation's "below 0.5 per cent" refers to the lows of 2019).
Bank of England, Monetary Policy Summary and minutes of the Monetary Policy Committee meeting ending on 16 September 2026 (published 17 September 2026), paras 32-52 (The September 2026 decision on the remaining gilts): https://www.bankofengland.co.uk/monetary-policy-summary-and-minutes/2026/september-2026. Paraphrased. Retrieved 1 October 2026. Para 32: QT increases the headroom and flexibility for the Bank to use its balance sheet in future if needed. Para 34: UK term premia on long-term government bonds have risen by an estimated 200 basis points since QT began in February 2022, mainly because of global economic policy uncertainty, heavy government bond issuance across countries and structural changes in the UK bond market; Bank staff estimate QT accounted for about 20-30 basis points. Para 34 also: over the past year the gilt market continued to function in an orderly manner. Para 35: the stock of gilts fell by GBP70 billion in the previous 12 months, GBP21 billion of it through sales. Para 38: fully unwinding respects the principle that the QE stock is not permanent. Para 39: a model in which sales go to the Government (through the Debt Management Office) remains subject to a final decision. Para 40: the Bank, consulting the Treasury, will keep GBP120 billion of the longest-dated APF gilts as backing for banknotes; in 2006 it had judged gilts suitable backing given lasting demand for banknotes. Para 41: the longest remaining gilt does not mature until 2049. Paras 42 and 44: a faster pace risks disrupting markets, at a time of volatile bond markets globally. Para 45: GBP368 billion to unwind: GBP222 billion by maturity and GBP146 billion by sales of GBP20 billion a year, an average fall of GBP46 billion a year to September 2034. Para 48: the vote was unanimous. Para 52: progress to be reviewed before April 2027; Bank APF auctions paused meanwhile. Derived for the numeric check: (368 - 222) / 20 = 7.3 years.
House of Commons Treasury Committee, Quantitative tightening, Fifth Report of Session 2023-24, HC 219, 7 February 2024 (Reserves and QT, the Bank's 2023 estimate, and the committee's verdict): https://publications.parliament.uk/pa/cm5804/cmselect/cmtreasy/219/report.html. Open Parliament Licence v3.0; quoted briefly. Retrieved 1 October 2026. Para 1: in winding down its gilt holdings, the Bank withdraws the reserves held by commercial banks by the same amount. Para 2: active QT, planned for October 2022, was postponed amid the crisis in pension funds' liability-driven investment strategies. Para 27: the Bank's August 2023 review estimated a rise of around 40 basis points in the ten-year gilt term premium since QT began, of which QT accounted for about 10-15 basis points. Para 37: the committee was concerned that the Bank was taking a "leap in the dark" by not tracking the effects of QT specifically and separately. Para 27 also quotes the Bank: the impact remains difficult to measure precisely. Para 29: in written evidence Handelsbanken put the impact of QT at 50 basis points on Bank Rate by mid-2025. Para 37 also notes a risk that QT is tightening monetary conditions by more than the Bank thinks. Para 39: the government gross financing requirement for 2024-25 includes GBP140 billion of gilt redemptions. Derived: maturing gilts are repaid from new borrowing, so with para 1, letting a gilt mature also drains reserves. Footnote 4: the Federal Reserve ran passive QT from 2017 to 2019.
Bank of England, Financial stability buy/sell tools: a gilt market case study, Quarterly Bulletin, 20 November 2023 (The 2022 gilt purchases and how they differed from QE): https://www.bankofengland.co.uk/quarterly-bulletin/2023/2023/financial-stability-buy-sell-tools-a-gilt-market-case-study. Paraphrased. Retrieved 1 October 2026. After the fiscal statement of 23 September 2022, 30-year gilt yields rose 130 basis points in three trading days to 28 September. Falling gilt prices cut the value of leveraged LDI funds, in which many pension funds invest; they struggled to meet margin calls, sold gilts, and a self-reinforcing spiral took hold. Between 28 September and 14 October 2022 the Bank bought GBP19.3 billion of gilts and sold them back over 12 trading days from 29 November 2022 to 12 January 2023. Table A: the purchases aimed to reduce a financial stability risk, were temporary, targeted at the most affected gilts and bought only at distressed prices, unlike QE, which aimed to ease monetary conditions.
Bank of England, What do we know about the demand for Bank of England reserves?, Bank Overground, 22 February 2023 (Why scarce reserves push market rates above Bank Rate): https://www.bankofengland.co.uk/bank-overground/2023/what-do-we-know-about-the-demand-for-bank-of-england-reserves. Paraphrased. Retrieved 1 October 2026. Banks in aggregate hold more reserves than they require, and paying Bank Rate on reserves has kept market rates in line with Bank Rate since 2009. As QT reduces reserves they could become scarce; banks would then bid up the price of reserves and market rates would rise above Bank Rate. The Bank calls the range just above that point the Preferred Minimum Range of Reserves.
International Monetary Fund, United Kingdom: 2025 Article IV Consultation, Staff Report, Country Report No. 25/204, para 25 (The Bank's estimate of the minimum reserves banks need): https://www.imf.org/en/-/media/files/publications/cr/2025/english/1gbrea2025001-source-pdf.pdf. Paraphrased, with credit to the IMF. Retrieved 1 October 2026. The Bank, from a survey of market participants in 2025 Q1, estimates the minimum reserves needed to meet banks' demand at GBP385-540 billion, and is moving from creating reserves through asset purchases to providing them mainly through repo operations.
Board of Governors of the Federal Reserve System, What Happened in Money Markets in September 2019?, FEDS Notes, 27 February 2020 (The United States in September 2019): https://www.federalreserve.gov/econres/notes/feds-notes/what-happened-in-money-markets-in-september-2019-20200227.html. Public domain (Federal Reserve Board). Retrieved 1 October 2026. Reserves reached a multi-year low of less than $1.4 trillion in mid-September 2019. SOFR, a broad measure of the cost of borrowing cash overnight against Treasury securities, printed at 2.43 percent on 16 September and above 5 percent on 17 September. The Federal Reserve Bank of New York announced repo operations on 17 September, after which rates moved back.
Board of Governors of the Federal Reserve System, Federal Reserve issues FOMC statement, 29 October 2025 (The Federal Reserve stops shrinking its holdings): https://www.federalreserve.gov/newsevents/pressreleases/monetary20251029a.htm. Public domain. Retrieved 1 October 2026. "The Committee decided to conclude the reduction of its aggregate securities holdings on December 1."
Bank of England, Transitioning to a repo-led operating framework, discussion paper, 9 December 2024 (The move to supplying reserves by repo): https://www.bankofengland.co.uk/paper/2024/dp/transitioning-to-a-repo-led-operating-framework. Paraphrased. Retrieved 1 October 2026. The Short-Term Repo facility, introduced in 2022, lets firms borrow reserves at Bank Rate against the highest-quality collateral, such as gilts. The Bank is moving to a demand-driven framework in which reserves are supplied mainly through repo; repo supply can expand and contract quickly as demand changes, and can be quickly replaced by asset purchases if the MPC decides these are needed. Repo is indexed to Bank Rate and so always earns at least what the Bank pays, while outright gilt holdings lose money if Bank Rate rises above their yield (para 13). The Bank expects reserves to be higher than before the 2007-08 financial crisis (para 15). Footnotes: under the Bank Charter Act 1844 the balance sheet is divided into the Issue Department, covering banknote issue, and the Banking Department; HM Treasury owns the risk and income of the Issue Department (para 14).
Bank of England, Transitioning to a repo-led operating framework: discussion paper feedback statement, 11 June 2025 (Banks' growing use of the repo facilities): https://www.bankofengland.co.uk/paper/2025/discussion-paper/transitioning-to-a-repo-led-operating-framework-discussion-paper-feedback-statement. Paraphrased. Retrieved 1 October 2026. Use of the Bank's repo facilities had continued to increase over recent months, with more firms taking part. Chart mark: June 2025, the date of this statement.
Paul Tucker, Quantitative easing, monetary policy implementation and the public finances, Institute for Fiscal Studies Green Budget 2022, chapter 7, October 2022 (Why spare reserves hold market rates at Bank Rate, and why a gilt can lose money): https://ifs.org.uk/sites/default/files/2022-10/Quantitative-easing-monetary-policy-implementation-and-the-public-finances-Green-Budget-2022.pdf. Paraphrased. Retrieved 1 October 2026. Central banks put a floor under market interest rates by paying their policy rate on reserves (a floor system). The reserves QE creates earn Bank Rate, while the gilts pay fixed rates, so QE in effect swapped fixed-rate government debt for borrowing at a rate reset with each Bank Rate decision (Box 7.1: the Bank's QE company pays for its gilts with a loan from the Bank charged at Bank Rate; the Treasury covers its losses, which arise when Bank Rate is above the portfolio's average yield).
Resolution Foundation, Recession ready? Assessing the UK's macroeconomic framework, September 2019 (Why further purchases might add little): https://www.resolutionfoundation.org/app/uploads/2019/09/MPU-paper.pdf. Paraphrased. Retrieved 1 October 2026; read from the PDF text (executive summary and section on QE). The authors argue that QE acts through long-term rates, which have a floor of their own. With ten-year yields near record lows (they put them below 0.5 per cent), they judged that a further round bigger than one roughly equal in effect to a one percentage point cut in Bank Rate would give little extra stimulus. They add that policy rates are hard to set much below zero.
All wording is our own. Charts are drawn from the data named under them.