Britain’s 30-year government bond yield exceeded 6% on 1 October 2026, marking its highest point since 1998. This milestone was reported alongside withdrawals of residential mortgage deals priced below 5%.
However, market conditions have shifted, with a Trading Economics snapshot on 2 October indicating that the 30-year yield has since fallen back below 6%.
The 30-year gilt yield reflects long-term UK government borrowing costs. Fixed mortgage pricing typically relies on shorter wholesale swap rates, such as the two- and five-year rates, along with lenders' funding costs, risks, and margins. The gilt yield does not directly determine individual mortgage rates.
On 1 October, the two-year SONIA swap rate was reported at 4.68%, an increase of 27 basis points over the month.