• Cable eased to 1.3586 as pound softened on X post from from ITV's Peston

• Peston says West to "press ahead with her stalking-horse leadership challenge"

• 1.3610 is subsequent high, following BBC report about West's aim

• West wants Starmer to set a timetable for election of new leader in September

• 1.3614 was London morning high, before a speech from UK PM Starmer

• Starmer says he will not walk away and vows to prove doubters wrong

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(Robert Howard is a Reuters market analyst. The views expressed are his own)