Keir Starmer faces intensifying pressure to resign as UK Prime Minister following accusations of misleading Parliament over the vetting process for Peter Mandelson's peerage appointment, with opposition leaders demanding his exit in the past week. His net approval rating has plunged to -45 in recent YouGov polling, amid Labour's dismal byelection losses and left-wing calls for a policy reset earlier this year. While Labour MPs express discontent, no viable replacement has emerged to trigger a leadership challenge, protected by the party's parliamentary majority against no-confidence votes. Traders watch May's local elections closely, as heavy defeats could accelerate internal revolt or force a snap contest, though constitutional hurdles favor Starmer's short-term survival.