The UK Treasury now shells out more than £100bn a year in debt‑interest, roughly one‑twelfth of all government spending. Elevated gilt yields and slower growth forecasts have pushed the cost of 10‑year bonds to almost 5%, far above France’s 3.6% and Italy’s 3.7%. Matching those rates could shave over £20bn off the annual bill, a saving that forces a rethink of financing tactics.

Mark Carney once warned that Britain leans on the “kindness of strangers”, meaning foreign investors shoulder both the loan and the currency‑risk premium. By issuing a slice of debt in euros—say 10% of the year's gilt programme—the government could tap a cheaper pool, lower demand for sterling bonds and push yields on the remaining 90% down through basic supply‑and‑demand dynamics.

Euro‑denominated borrowing does introduce redemption risk if the pound weakens against the euro, but that risk only materialises when UK inflation outpaces the Eurozone. Consequently the Treasury gains an incentive to keep price stability tight, reinforcing credibility with investors. The proposal offers a concrete path to curb the interest bill without altering fiscal targets, delivering immediate taxpayer relief.