Green Party Optimistic Ahead of Hackney Local Elections

The Green party in Hackney, London, is feeling optimistic about the local elections. Today in Focus host Helen Pidd meets the Hackney mayoral candidates, a group of Green party canvassers, and residents in Hackney weighing up who to vote for. Also, Peter Walker, the Guardian's senior political correspondent, discusses how tactical voting might play out in the elections and the challenges the Greens will face if the polls are right.