UK government borrowing costs jumped sharply on Friday, with 30-year gilt yields rising almost 13 basis points to 5.779%, close to a near three-decade high. The move followed renewed global bond stress linked to inflation worries from the Iran war and firm rate-hike expectations in the US. But the shock was sharper in Britain after Andy Burnham secured a potential path to challenge Labour PM Keir Starmer, raising investor fears of higher public borrowing.
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