The mayor of London has responsibilities covering policing, transport, housing, planning, economic development, arts, culture and the environment.

[11] The proposal was voted through by the London Assembly with support from Labour, Liberal Democrat and Green members and opposition from the Conservatives.

[11][14] In July 2023, Labour failed to win the Uxbridge and South Ruislip by-election by a narrow margin, which was credited to local opposition to expansion of the ULEZ.

[15] Khan later extended financial support available to scrap non-compliant vehicles to all London residents, rather than the previous plan to apply a means test, funded from reserves.

[19] All registered electors (including British, Commonwealth, Irish, and certain European Union citizens) living in London aged 18 or over were entitled to vote in the mayoral election.

[24][25] Khan pledged to maintain the 2030 target for Greater London Authority operations to reach net zero emissions, including decarbonising all buses and establishing a fund to put solar panels on school roofs as part of a wider climate plan.

[31] He said he would hire 1,300 more police officers and establish a free legal advice service for victims of sexual offences.

[38] He promised not to introduce road pricing, which a Conservative election leaflet, designed to look like a penalty notice, accused him of doing.

[44] Hall is considered to be on the right wing of the Conservative Party and had enthusiastically supported Liz Truss as prime minister and Donald Trump as president of the United States.

[30] Hall said she would "ban officers overtly supporting LGBT campaigns by wearing rainbow flag badges, or engaging in anti-racism gestures".

[56] In February 2023 the Green Party selected Zoë Garbett, a councillor on Hackney London Borough Council who works on health inequalities for the NHS, to be their mayoral candidate.

[57] She said that she wanted to replace the ULEZ and congestion charge with road pricing based on "distances driven, vehicle emissions, time of day and location", with potential to account for the number of passengers in the future.

[66] Blackie promised to introduce grants to pay for the installation of solar panels and trialling both allowing all buses to be hailed from any location after 10pm and free cycle hire on Sundays.

[42] He said he wanted ULEZ implementation to be "fairer", giving an example of some night shift workers being charged to both go to and leave work.

He promised to cancel the Underground fare freeze and suspension of peak prices on Fridays in order to increase police budgets by £117 million.

Cox had campaigned against increases in hydrocarbon oil duty, a tax on fossil fuels used by most road motor vehicles.

[67] Reform said that Cox would abolish the ULEZ entirely, end low traffic neighbourhood schemes and reduce the use of 20 mph speed limits.

He held junior ministerial positions in Gordon Brown's government including spending a year as transport minister.

The shadow foreign secretary David Lammy and the former speaker of the House of Commons John Bercow had been suggested as possible alternative candidates for the party.

[80] It was reported that the Conservatives were seeking to find a celebrity or high-profile businessperson to run as their candidate, such as Karren Brady or Robert Rinder, but the party's former mayoral nominee Steven Norris said it was difficult to convince people to "potentially ruin their reputation, for half the city to hate them".

[82] Kasumu had worked as an adviser to Boris Johnson, but resigned in 2021, saying he thought that the Conservative Party were trying to "pick a fight on the culture war and to exploit division".

[83] On the question of expansion of the Ultra Low Emission Zone to cover all of Greater London, Boff, Campbell, Rogers and Scully all said they would unilaterally reverse it if elected while Kasumu said he would grant referendums to affected boroughs to decide whether to be part of it.

She expressed concern that some striking London Underground staff "are earning far more than average" and pledged to review their pay and benefits.

[96] Instead of ULEZ expansion, Korski said he wanted to plant trees, electrify buses and referred to "large ventilators on billboards that suck the pollution out of the air" in Peru as a better solution.

[106] He voted for the UK to remain in the European Union in the 2016 referendum and supported Tom Tugendhat's Conservative leadership campaign.

[94] In June 2023, the TV producer Daisy Goodwin said that Korski had groped her during a meeting in Downing Street a decade earlier.

[131] French, who works as a community advocate and previously served as a special constable, had said he would reform policing and reduce health inequalities.

[133] Reform UK selected Howard Cox, a campaigner against hydrocarbon oil duty increases, as its candidate.

The former leader of the Labour Party Jeremy Corbyn said he would think about standing for mayor as an independent when asked at the Edinburgh Festival Fringe in August 2023.

[158] Corbyn is the MP for Islington North and was a Labour member at the time, but was expelled from the Party after successfully running as an independent in the 2024 United Kingdom general election.