Incumbent Lutfur Rahman of Aspire leads trader consensus at 52% implied probability to win the Tower Hamlets mayoral election on May 7 under first-past-the-post voting, bolstered by his 2022 victory with 54.9% in the final round and Pollcheck projections of Aspire securing a large council majority amid the simultaneous local contests. Labour's Sirajul Islam, opposition leader and selected candidate in July 2025, trails at 30%, reflecting challenges in reclaiming ground lost since 2018 despite recent manifesto launches and leaflet campaigns. The other seven candidates—spanning Reform UK, Conservatives, Liberal Democrats, Greens, independents, TUSC, and Tower Hamlets Independents—hover at 24-26%, fragmented opposition likely aiding Rahman's path in this diverse borough focused on housing and budgets. Formal nominations finalized last week triggered active campaigning, with no recent polls but historical turnout at 42% underscoring tight race potential.