Where every figure came from
Bank of England, Monetary Policy Summary and minutes, September 2022 (published 22 September 2022) (The rate rise the day before): https://www.bankofengland.co.uk/monetary-policy-summary-and-minutes/2022/september-2022. Paraphrased. At its meeting ending on 21 September, published on 22 September, the Monetary Policy Committee raised Bank Rate by 0.5 percentage points to 2.25%. It noted that a Growth Plan announcement was due shortly after the meeting and would be assessed in its November round. Retrieved 3 October 2026.
Office for National Statistics, Consumer price inflation, UK: August 2022 (Inflation): https://www.ons.gov.uk/economy/inflationandpriceindices/bulletins/consumerpriceinflation/august2022. Open Government Licence v3.0. Main points: annual CPI inflation was 9.9% in August 2022 (10.1% in July). Retrieved 3 October 2026.
Institute for Fiscal Studies, Mini-Budget response (23 September 2022) (The policy, borrowing, and the Bank): https://ifs.org.uk/articles/mini-budget-response. IFS copyright; paraphrased. The director's statement: adding to demand in an economy with high inflation leaves the government pulling the opposite way to the Bank of England, which is likely to raise rates in response; the plan was presented without forecasts from the OBR. Section "Public finances": borrowing this year on course for £190 billion, 7.5% of national income, the third-highest peak since the Second World War. Section "Tax cuts - the big picture": in the IFS's words, the biggest cut to the planned level of tax at any budget since 1972. Read from the Internet Archive capture of the original file, https://web.archive.org/web/20220923142938id_/https://ifs.org.uk/articles/mini-budget-response (capture 2022-09-23). Retrieved 3 October 2026.
Bank of England, Statement from the Governor of the Bank of England (26 September 2022) (The Governor's statement): https://www.bankofengland.co.uk/news/2022/september/statement-from-the-governor-of-the-bank-of-england. Paraphrased; one phrase quoted. The Governor, Andrew Bailey, said the Monetary Policy Committee would make a full assessment at its next scheduled meeting and "will not hesitate to change interest rates by as much as needed", with the aim of bringing inflation back to its 2% target. Retrieved 3 October 2026.
Office for Budget Responsibility, Economic and fiscal outlook, November 2022 (The forecast that was not asked for; market expectations; global forces): https://obr.uk/docs/dlm_uploads/CCS0822661240-002_SECURE_OBR_EFO_November_2022_WEB_ACCESSIBLE.pdf. Crown copyright, Open Government Licence v3.0; paraphrased. Foreword, forecast timetable: the OBR had confirmed it could provide a forecast alongside any fiscal event in September; on 7 September the Treasury told it that the Chancellor would not commission one for the Growth Plan. Economic outlook, para 13 (heading "Energy prices, interest rates and the exchange rate"): comparing its economy forecast with March, by early November the differences in key market determinants largely reflected global developments since March, while UK-specific factors appear to have made some movements worse around the 23 September Growth Plan: further cuts to Russian gas exports to Europe, government bond yields rising internationally and a stronger US dollar; immediately after the Growth Plan, market expectations put the peak in Bank Rate as high as 6.2 per cent. Read from the Internet Archive capture of the original file, https://web.archive.org/web/20221117151056id_/https://obr.uk/docs/dlm_uploads/CCS0822661240-002_SECURE_OBR_EFO_November_2022_WEB_ACCESSIBLE.pdf (capture 2022-11-17). Retrieved 3 October 2026.
HM Treasury, The Growth Plan 2022, CP 743 (23 September 2022), para 1.13 (How much more the government had to raise): https://www.gov.uk/government/publications/the-growth-plan-2022-documents. Crown copyright, Open Government Licence v3.0. Para 1.13: the Debt Management Office's net financing requirement (the amount to be raised by selling gilts and Treasury bills, including what is needed to repay gilts falling due) for 2022-23 was raised from £161.7 billion (April 2022) to £234.1 billion (September 2022), financed by additional gilt sales of £62.4 billion and £10.0 billion of Treasury bills. Derived here: 62.4 + 10.0 = 72.4 = 234.1 - 161.7, so the two figures reconcile; 234.1 / 161.7 = 1.448, a rise of about 45 per cent. Retrieved 3 October 2026.
Bank of England, Financial stability buy/sell tools: a gilt market case study, Quarterly Bulletin (20 November 2023) (How LDI funds were forced to sell, and the Bank's choice): https://www.bankofengland.co.uk/quarterly-bulletin/2023/2023/financial-stability-buy-sell-tools-a-gilt-market-case-study. Paraphrased. Note on LDI: an approach used by defined benefit pension schemes so that the value of their investments moves more in line with the pensions they have promised; pooled LDI funds pool money from many schemes. Section 1: as gilt prices fell, the value of the leveraged funds dropped; they struggled to meet margin calls on their repo and derivative positions (borrowing secured on gilts); pooled funds were often the most leveraged; some headed towards a net asset value of zero, at which lenders would seize and sell the collateral; moving cash in from the schemes was too slow for the speed of the fall, so funds sold gilts and a self-reinforcing loop took hold; their desired sales outran a typical day's trading and others grew less willing to intermediate; the FPC judged it a material threat to UK financial stability. Section 5: the index-linked market has a much smaller investor base, largely LDI funds, and by 10 October almost no willing buyers were left. Section 2: lending is unattractive when the need to cut leverage drives the stress; the Bank considered lending via banks but judged purchases more likely to work. Section 7: the operations halted the self-fulfilling loop of LDI gilt sales and bought time for the weakness to be addressed. Retrieved 3 October 2026.
Bank of England, Financial Stability Report, December 2022 (Mortgage pricing; how far gilt yields rose against other countries'): https://www.bankofengland.co.uk/financial-stability-report/2022/december-2022. Paraphrased. Box B: fixed mortgage rates are closely tied to overnight index swap rates, which largely reflect expectations for Bank Rate; the two-year swap rate rose in September to over 5% and fed through to mortgage rates; the average quoted two-year fixed rate at 75% loan to value had been below 2% in recent years. Section 1: between 1 August and their peak on 14 October, 30-year gilt yields rose by more than 270 basis points, while 30-year US Treasury and German yields peaked about 150 basis points above their starting points. Retrieved 3 October 2026.
Bank of England Database, quoted two-year fixed-rate mortgage at 75% loan to value, monthly (IUMBV34), and Bank Rate (IUDBEDR) (The episode chart): https://www.bankofengland.co.uk/boeapps/database/. Open Government Licence v3.0. IUMBV34, per cent: January 2022 1.64; July 2022 3.48; August 2022 3.6; September 4.17; October 5.99; November 5.98; December 5.43; April 2023 4.6; July 2023 6.22 (the highest month from January 2022 to December 2023). A 75% loan to value means a 25% deposit. IUDBEDR: Bank Rate rose at every change date from 22 September 2022 to 3 August 2023. Retrieved 3 October 2026 as CSV on the device and read twice.
Bank of England, Financial Policy Summary and Record, March 2023 (The LDI buffer): https://www.bankofengland.co.uk/financial-policy-summary-and-record/2023/march-2023. Paraphrased. The FPC recommended that The Pensions Regulator set minimum levels of resilience for LDI funds, and judged that they should withstand a rise in gilt yields of around 250 basis points at a minimum, in addition to what they need for other risks and day-to-day moves. Retrieved 3 October 2026.
Budget Responsibility Act 2024 (c. 24), as enacted (The new duty): https://www.legislation.gov.uk/ukpga/2024/24/enacted. Crown copyright, Open Government Licence v3.0. Royal Assent 10 September 2024. Section 1 inserts section 4A into the Budget Responsibility and National Audit Act 2011: before a minister makes a fiscal announcement to the House of Commons of a fiscally significant measure, the Treasury must ask the OBR for a report taking account of it (4A(1)); if no request is made and the OBR is of the opinion that the measure is fiscally significant, it must notify the Commons Treasury Committee and prepare a report that includes a costing (4A(2)); a measure that is temporary and responds to an emergency is excepted (4A(4)); a measure is fiscally significant if its costing exceeds a percentage of GDP set in the Charter for Budget Responsibility (4A(3)). Retrieved 3 October 2026.
Budget Responsibility Act 2024 (Commencement) Regulations 2024, SI 2024/1026 (When the duty took effect): https://www.legislation.gov.uk/uksi/2024/1026/made. Crown copyright, Open Government Licence v3.0. Regulation 2: section 1 of the Act comes into force on 15 October 2024 (made 14 October 2024). Retrieved 3 October 2026.
Prime Minister's Office, PM press conference opening remarks, 14 October 2022 (The reason the Prime Minister gave): https://www.gov.uk/government/speeches/pm-press-conference-opening-remarks-14-october-2022. Crown copyright, Open Government Licence v3.0; quoted briefly. She said parts of the mini-budget went further and faster than markets were expecting, that the government needed "to reassure the markets of our fiscal discipline", and that she had decided to keep the planned rise in corporation tax. Retrieved 3 October 2026.
All wording is our own. Charts are drawn from the data named under them.