Reuters Online invited readers to send in their questions to the four leading candidates in the Mayor of London election.

Transport and the Congestion Charge dominated your questions, but you also wanted to know about race relations.

Here are the answers from Labour’s Ken Livingstone, Conservative Boris Johnson, LibDem Brian Paddick and the Green Party’s Sian Berry.

For Ken Livingstone’s answers, read here

For Boris Johnson’s answers, read here

For Brian Paddick’s answers, read here

For the Sian Berry’s answers, read here

How will Ken Livingstone, Boris Johnson, Brian Paddick or Sian Berry spend London’s annual 11 billion-pound budget if they are elected mayor on May 1?

How will they tackle youth crime and congestion,  and how will the capital maintain its position as a global cultural and financial hub?

The budget is in their hands, but you can quiz them on how they will spend it.

The four leading candidates in the Mayor of London election have agreed to answer your questions.

We asked you to send in your questions, and have now sent a selection to the relevant candidates.

Their answers will be posted here on April 24.