UK bond markets showed further signs of unease on Monday morning after a series of Downing Street resignations concentrated minds on the uncertain future of prime minister Sir Keir Starmer. The 10-year gilt yield – a key benchmark for the government – rose as much as six basis points to 4.57 per cent following news of the resignation of Downing Street communications chief Tim Allan, the second such departure of a close Starmer aide in 24 hours following the exit of chief of staff Morgan McSweeney on Sunday.  [...]