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London mayoral election 2016: Who's going to win and what are the key issues? All the big questions explained London mayoral election 2016: Who is going to win and what are the key issues? The big questions explained
(about 2 hours later)
Londoners will vote to choose the Mayor of London, who effectively runs the capital and most of its suburbs.Londoners will vote to choose the Mayor of London, who effectively runs the capital and most of its suburbs.
The Mayor jointly administers the city with the local borough councils but has powers over policing, transport, planning, housing, and the local environment.The Mayor jointly administers the city with the local borough councils but has powers over policing, transport, planning, housing, and the local environment.
Voters will also elect the London Assembly – a body that scrutinises the mayor’s policies and holds them to account.Voters will also elect the London Assembly – a body that scrutinises the mayor’s policies and holds them to account.
Most voters in London are concerned with housing, which is very expensive in the capital. Transport is also a significant concern. Most voters in London are concerned with housing, which is very expensive in the capital. Transport is also a significant concern. 
The Conservatives have based their campaign around claims that Labour’s candidate Sadiq Khan is somehow associated with extremists, but voters seem fairly disinterested in these claims.The Conservatives have based their campaign around claims that Labour’s candidate Sadiq Khan is somehow associated with extremists, but voters seem fairly disinterested in these claims.
Labour has proposed a freeze for transport fares and a new city agency to help build more houses.Labour has proposed a freeze for transport fares and a new city agency to help build more houses.
Sadiq Khan has a 20-point lead over the Tories’ Zac Goldsmith in all polls; for Khan to lose would be a major upset.Sadiq Khan has a 20-point lead over the Tories’ Zac Goldsmith in all polls; for Khan to lose would be a major upset.
Minor parties are expected to do quite well, with the Greens’ hoping to maintain their third place finish from 2012 and Ukip looking to make inroads – possibly gaining a member of the London Assembly.Minor parties are expected to do quite well, with the Greens’ hoping to maintain their third place finish from 2012 and Ukip looking to make inroads – possibly gaining a member of the London Assembly.
Counting starts on Friday morning, the votes having been cast on Thursday. Depending on how many recounts there are and how close it is, we might not know until early evening or it could be in by a late lunch.Counting starts on Friday morning, the votes having been cast on Thursday. Depending on how many recounts there are and how close it is, we might not know until early evening or it could be in by a late lunch.
Voters elect the Mayor of London using a system called “supplementary vote” where they can make a first preference and a second preference. If a voter’s second preference isn’t in the top two placed candidates, their second vote is activated.Voters elect the Mayor of London using a system called “supplementary vote” where they can make a first preference and a second preference. If a voter’s second preference isn’t in the top two placed candidates, their second vote is activated.
This system allows people to vote for a smaller party candidate without worrying that their vote might be wasted.This system allows people to vote for a smaller party candidate without worrying that their vote might be wasted.
The London Assembly is elected using a system of proportional representation called the “additional member system” – members (AMs) are elected to represent particular part of London; but voters also have a second vote that elects AMs to represent the whole of London. The London Assembly is elected using a system of proportional representation called the “additional member system” – members (AMs) are elected to represent particular part of London; but voters also have a second vote that elects AMs to represent the whole of London. 
The London-wide AMs are added to the result to make sure the final result is proportional to the votes cast, which helps smaller parties who don’t have enough concentrated support to win a constituency.The London-wide AMs are added to the result to make sure the final result is proportional to the votes cast, which helps smaller parties who don’t have enough concentrated support to win a constituency.