The 2028 London mayoral election is scheduled to be held on 4 May 2028 to elect the Mayor of London. The election will take place the same day alongside the elections to the London Assembly, as well as local elections across England including other mayoral elections. The incumbent Labour Party mayor, Sadiq Khan, won the previous three mayoral elections.

Electoral system The election is expected to use a supplementary vote system for the first time since the 2021 London mayoral election, in which voters express a first and a second preference for candidates. This means that the winning candidate has the support of a majority of voters who expressed a preference among the top two. Whilst a reintroduction of the supplementary vote system for the election of the mayor of London is included in the English Devolution and Community Empowerment Act 2026, an election would currently be held under first-past-the-post voting until the relevant secondary legislation is introduced.

The 2024 election also saw the ballots counted by hand for the first time, after previous mayoral elections had used a technological solution where ballots were scanned. The Greater London Authority are considering returning to a scanning system for 2028.

Candidates Labour Party Incumbent mayor Sadiq Khan could stand for a fourth term. He is yet to announce whether he will stand, and is considering running again. However, it has been reported that he was expected to stand down, and in June 2025, the New Statesman reported that Khan had privately indicated he did not wish to stand. Despite these reports, in September 2025, Khan said that it was his "intention" to stand again in 2028, and, in February 2026, said he had "already worked out" his campaign for the next election.

Dawn Butler, the MP for Brent East, said in an interview with The Guardian in 2023 that she would put her name forwards if Khan were not to stand. In 2025, she confirmed her intention to stand if Khan stood down.

Other potential candidates include: Rosena Allin-Khan, MP for Tooting, Mete Coban, Deputy Mayor of London for Environment and Energy, Stella Creasy, MP for Walthamstow, Idris Elba, actor and knife crime activist, Florence Eshalomi, MP for Vauxhall and Camberwell Green, Georgia Gould, MP for Queen's Park and Maida Vale and Minister of State for Schools, Claire Holland, leader of Lambeth Council, Lewis Iwu, campaigner and author, David Lammy, MP for Tottenham and former Deputy Prime Minister, Emily Thornberry, MP for Islington South and Finsbury.

Conservative Party On 29 August 2026, James Cleverly, MP for Braintree and former Home Secretary, resigned as the Shadow Secretary of State for Housing, Communities and Local Government to run for Mayor.

Other potential candidates include: Nickie Aiken, former MP for Cities of London and Westminster, Andrew Boff, member of the London Assembly, Alex Challoner, founder of public relations company Cavendish Communications, Sebastian Coe, former athlete, sports administrator and life peer, Justine Greening, former MP for Putney and former Education Secretary, Paul Scully, former MP for Sutton and Cheam, former London minister, and candidate for mayor in 2024. Festus Akinbusoye former Bedfordshire Police and Crime Commissioner, and member of Westminster City Council.

Reform UK In January 2026, Reform announced that Laila Cunningham, a Westminster City Councillor and former CPS prosecutor, who defected from the Conservative Party to Reform UK in June 2025, would be their candidate.

Boxer Derek Chisora was previously mentioned as a potential candidate.

Liberal Democrats In September 2026, Sarah Olney announced she would seek to be the Liberal Democrats' candidate.

Other potential candidates Ant Middleton, a TV presenter and former soldier, had initially put himself forward to be a Reform candidate. However, in August 2025, it was reported that he would instead stand as an independent.

It has been reported that actor James Corden is considering standing for mayor. He is thought to be a Labour supporter.

Thomas Skinner, a businessman and TV personality, is a potential candidate and was approached by three political parties, according to The Telegraph.

Russell Brand, a comedian, said on The Tucker Carlson Show he "would like to run" for Mayor of London in 2028, and said he may be serving a jail sentence at the time of the election if he is found guilty in an ongoing rape trial.

Opinion polls With generic party candidates These polls have been conducted before candidate details were finalised, so respondents are asked which party's candidate they would vote for.

With preferences Date(s)conducted Pollster Client Sample sizePreference Lab Con LD Grn RefOthers Lead10–17 Jul 2026OpiniumFestus Akinbusoye2,021First32%17%10%18%17%5%14Second16%17%20%18%12%18%2 rowspan="1" 2024 mayoral election – N/A 43.8% 32.7% 5.8% 5.8% 3.2% 8.6% 11.1

With no preferences Date(s)conducted Pollster Client Sample size Lab Con LD Grn RefOthers LeadSavantaQMUL1,03833%18%9%17%18%6%15Savanta QMUL1,00632%20%11%13%19%5%12SavantaQMUL1,00335%23%14%11%14%3%12Find Out NowAlex Wilson1,10233%20%10%13%20%4% 13SavantaQMUL1,00435%26%11%11%13%4%9 rowspan="1" 2024 mayoral election – 43.8% 32.7% 5.8% 5.8% 3.2% 8.6% 11.1

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