LONDON, May 15 (Reuters) - British government borrowing costs jumped on Friday with long-term yields climbing by more than those of German bunds after Andy Burnham, on the left of the governing Labour Party, secured a possible path to challenge Prime Minister Keir Starmer.
The yields on 30-year British gilts - a barometer of how investors view the long-term borrowing needs of the government - leapt by almost 13 basis points in early trade to a high of 5.778%.
German 30-year bund yields were up by 3-4 bps.
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