UK borrowing costs have climbed and the pound has dropped following the resignation of two top aides to Prime Minister Keir Starmer. Interest rates on UK government bonds, known as yields, rose as traders reacted to the news that chief of staff Morgan McSweeney and communications director Tim Allan are leaving their posts. At the same time, the pound fell against the euro, hitting its lowest point in over two weeks. Analysts say financial markets are now weighing the Prime Minister's chances of staying in power. Investors worry that his likely replacements would prefer more left-wing policies, which could lead to higher government spending and put more pressure on both bonds and the British currency.