Michael Crick explains AV
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AV explainer: How does AV work?

The government is holding a referendum on May 5 on whether to change the system for electing MPs. The public will be asked whether they want to replace the existing first-past-the-post system for electing MPs to Westminster with a method known as the alternative vote (AV).

Newsnight's Political editor Michael Crick explains how the system would work.

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