UK government borrowing costs rise to a 28-year high as investors react to leadership uncertainty in the country. According to the reports, the yield on 30-year gilts increases sharply, jumping by as much as 13 basis points. The yield moves to just over 5.8%, which is described as the highest level since 1998. The surge indicates tighter market pricing for long-term government debt, reflecting heightened concern about future policy direction and economic prospects. The increase occurs in the context of ongoing political uncertainty, with market participants appearing to demand higher returns to hold longer-dated UK government bonds. While the coverage focuses on the movement in gilt yields, it does not detail specific policy measures driving the decision in the articles provided. Overall, the sources agree that the significant rise in 30-year gilt yields marks a notable shift in market conditions and borrowing costs for the UK government.