The UK government sold £1 billion of 30-year bonds on Tuesday, 10 November 2026, at an average yield of 5.540%, as strong investor demand met the Debt Management Office's latest long-dated gilt auction.

The sale covered £1,000 million of the 5⅜% Treasury Gilt 2056, a bond that matures in January 2056. The Debt Management Office said the average accepted price was 97.618, raising £976.18 million in cash, and the bid-to-cover ratio was 3.75, meaning investors placed bids worth £3.75 for every £1 of bonds on offer.

The yield tail, the gap between the average yield and the highest yield accepted at the auction, was 0.3, a small figure that suggests bidding was tightly grouped and the sale went smoothly.

Long-term borrowing costs stay high

The result underlines how expensive long-term government borrowing remains. A yield of 5.540% is the return investors demand to lend to the UK government for three decades, and it sits close to the 30-year gilt yield of around 5.59% seen in morning trading on Tuesday. The 10-year gilt yield was around 5.14% at the same time.

High gilt yields matter beyond the bond market. They set the cost of financing government debt, influence mortgage pricing and shape the backdrop for the Chancellor's fiscal plans. The Office for Budget Responsibility has already forecast debt interest spending of £109 billion in the current financial year, and every auction at yields above 5% adds to the pressure on the public finances.

The auction came five days after the Bank of England raised its base rate to 4% from 3.75%, with eight of the nine members of the Monetary Policy Committee voting for the increase. Bank of England Deputy Governor Clare Lombardelli has since said a further rise in December cannot be ruled out, and money markets put roughly even odds on another move when policymakers next meet on 17 December.

Strong demand despite high yields

Despite the high yield, demand for the bonds was solid. A bid-to-cover ratio of 3.75 compares with 3.38 at the DMO's previous auction, the sale of £3.25 billion of green gilts on 3 November, which cleared at an average yield of 5.268%. Long-dated gilts are typically bought by pension funds and insurers matching long-term liabilities, and that investor base has continued to absorb supply even as yields have climbed.

The DMO's auction calendar remains busy. An ad hoc gilt tender is scheduled for Wednesday 11 November for up to £1,000 million of the 0⅛% Treasury Gilt 2028, and a further auction of £4,000 million of the 4⅛% Treasury Gilt 2033 is due on Thursday 12 November.

Markets will also be watching US consumer price inflation data, due at 1.30pm UK time on Tuesday, for clues on whether the Federal Reserve will raise American interest rates in December. A hotter-than-expected reading could push global bond yields higher still, while a softer figure would ease some of the pressure on gilts.

What a gilt auction means

Gilts are bonds issued by the UK government to fund public spending. At an auction, the Debt Management Office offers a set amount of a particular gilt and investors bid for it, stating the price they are willing to pay. The average yield is the return implied by the average price accepted, and the bid-to-cover ratio shows how many times the amount on offer was covered by bids.

A high bid-to-cover ratio and a small yield tail are signs of healthy demand. A low ratio or a wide tail would suggest investors are reluctant to buy, which would push yields up and raise the government's borrowing costs further.

Tuesday's result, with bids worth 3.75 times the amount sold and a narrow tail, suggests demand for long-dated UK government debt remains firm even at yields above 5.5%.