An orderly, autumn-dated exit would remove some of the acute uncertainty that has been pressuring sterling, since markets generally prefer a defined timetable over an open-ended leadership crisis. That said, the medium-term picture stays clouded given Burnham's more left-leaning fiscal instincts relative to Starmer, keeping a political risk premium embedded in gilts and GBP/USD until his policy direction becomes clearer. A clean handover with no contest would likely be read as the better outcome for sterling than a drawn-out leadership race, so confirmation of Streeting standing aside would be a relevant signal to watch alongside Monday's announcement.Earlier:Politics weigh on GBP: Starmer given until Tuesday to set exit date or face mass resigns---Starmer is expected to confirm an autumn exit timetable Monday, clearing the way for Burnham, as cabinet pressure and a Trump social media post add to the noise. Summary:According to the Guardian, citing cabinet ministers and government sources:Starmer is expected to announce a departure timetable Monday morning, with an autumn exit seen as most likelyMore than half a dozen cabinet ministers have privately told him his time is up, ahead of a hostile Tuesday cabinet meetingAn autumn date would give Burnham time to build a team before Labour's late September conferenceWes Streeting says he still intends to stand, though some now expect him to step backDonald Trump posted on social media appearing to confirm Starmer's resignation, criticising his record on immigration and energyKeir Starmer is expected to confirm a timetable for his departure on Monday morning, with an autumn exit the most likely outcome, clearing the way for Andy Burnham to take over without a full leadership contest.Cabinet pressure has been building, with more than half a dozen ministers said to have privately told Starmer his time is up, ahead of a hostile cabinet meeting expected Tuesday. An autumn handover would let Burnham assemble a team before Labour's late September conference, though it remains unclear whether he would face a contest. Wes Streeting maintains he intends to stand, though expectations are growing he may ultimately step back.Adding to the noise, Donald Trump posted on social media appearing to pre-empt the announcement, criticising Starmer's record on immigration and energy policy.For sterling, the key takeaway is that a defined exit date would reduce near-term uncertainty, even as the longer-term fiscal and policy implications of a Burnham government remain the bigger unknown for markets. This article was written by Eamonn Sheridan at investinglive.com.