The Bank of England Is Quietly Shrinking Its Bond Pile — Here's Why Your Mortgage Should Care

While most of the attention on 30 July was on the Bank of England holding its base rate at 3.75%, a quieter but arguably more important process has been running in the background for years: the Bank has been steadily shrinking the enormous pile of government bonds (gilts) it bought after the financial crisis and during the pandemic.

What's actually happening

At its peak, the Bank's Asset Purchase Facility — the vehicle used to buy gilts under quantitative easing (QE) — held around £895bn of bonds. As of 22 July 2026, that had been run down to £492bn, through a mix of letting bonds mature and actively selling them back into the market. This process, the reverse of QE, is known as quantitative tightening (QT).

The Monetary Policy Committee held Bank Rate at 3.75% on 30 July, in a 6–3 vote, with three members preferring a hike — but QT runs on its own schedule, set annually regardless of what happens to the headline rate meeting to meeting.

Why this affects your money even though it's not "the interest rate"

When the Bank sells gilts (or lets them mature without reinvesting), it adds to the overall supply of government bonds the market has to absorb. More supply, other things equal, tends to push gilt yields higher — and long-term gilt yields are one of the key ingredients lenders use to price fixed-rate mortgages, because banks fund fixed-rate lending partly by matching it against gilts and swaps of a similar maturity.

That's one reason average two-year fixed mortgage rates have climbed back above 5% even as the base rate itself has been held steady for five consecutive meetings — QT is adding upward pressure on the funding cost side of the equation, separate from what the Bank is doing with Bank Rate itself.

What it means for savers and mortgage holders

For savers, higher gilt yields can filter through to slightly better rates on longer-dated fixed bonds, since providers price these off gilt yields too. For mortgage holders coming off a fixed deal, it means the "wait for rates to fall" strategy is less reliable than it looks — QT is a structural drag working in the opposite direction to any future Bank Rate cuts, and the two forces can offset each other in ways that are hard to predict from the base rate announcement alone.

How other central banks compare

The US Federal Reserve has run its own version of QT since 2022, shrinking its balance sheet from a peak of roughly $9 trillion, and has similarly found long-term Treasury yields more stubborn than short-term rates would suggest. The European Central Bank has been reducing its bond holdings under a broadly similar run-off approach. All three central banks face the same tension: QT tends to push against efforts to keep long-term borrowing costs low, even while short-term policy rates move independently.

Key Numbers

• £895bn — peak size of the Bank's Asset Purchase Facility
• £492bn — size as of 22 July 2026
• 3.75% — Bank Rate held on 30 July 2026, 6–3 vote

Sources

• Bank of England — latest and upcoming publications
• Interest rates and monetary policy — House of Commons Library

Educational content only — not financial advice.