• Wes Streeting resigns as UK health secretary and announces candidacy for Labour leadership.
• The move follows disastrous local election results for the Labour Party.
• Streeting criticizes Starmer's leadership and calls for a "proper contest" among candidates.
• Greater Manchester mayor Andy Burnham may also challenge for the leadership.
• Labour leadership contest requires backing from at least 20% of MPs to trigger.

Wes Streeting, the former UK health secretary, has officially announced his intention to run for the leadership of the Labour Party, aiming to replace Prime Minister Keir Starmer. This announcement follows a series of dismal local election results that led to Streeting's resignation and has catalyzed internal challenges to Starmer’s leadership. "We need a proper contest with the best candidates on the field, and I’ll be standing," Streeting stated during a think tank event in London, implying a significant shift in the party's dynamics, according to CBS News and Channel News Asia.

While no other senior ministers have resigned alongside him, Streeting's resignation has heightened the pressure on Starmer, whose leadership has faced mounting criticism. Streeting emphasized the importance of allowing all serious contenders, including Greater Manchester Mayor Andy Burnham, to formally enter the race without rushing. "If we had rushed ahead without giving Andy a chance to stand, the new leader... would lack legitimacy," he indicated, as the party scrutinizes its internal leadership options following poor electoral performance, according to Al Jazeera and Channel News Asia.

The Labour Party requires at least 81 MPs—20% of its members in Parliament—to back a candidate for a leadership contest to be officially triggered. Starmer would automatically be on the ballot if he chooses to defend his position. Streeting, who is considered to be on the right of the party spectrum, has begun articulating his policy stances, notably characterizing Brexit as "a catastrophic mistake" and advocating for a renewed relationship with the European Union, signaling potential shifts in party ideology, according to CBS News and Channel News Asia.

Starmer, now facing increased dissent within his party, has been urged by over 80 Labour MPs to step down, indicating a precarious position for his leadership as multiple figures signal their readiness to challenge his authority. Amidst this backdrop, Burnham is also positioning himself for a potential leadership bid, further complicating the contest dynamics. "We need our best players on the pitch," Streeting tweeted, highlighting Burnham’s suitability as a strong contender, according to Al Jazeera.