Alexander Jan leads the City Economics team at engineering and consultancy firm Arup and is a columnist for City AMAlex Ingram is a cycling campaigner with groups in Lewisham and Islington and with national campaigns. He blogs at Alex in the Cities(alexinthecities.co.uk)Kate Arnell is a TV presenter who currently presents BBC America's Anglophenia. She has a blog oneco-living at EcoBoost (eco-boost.co)Jonn Elledge is a journalist and edits New Statesman's urbanism magazine site (citymetric.com). He presents CityMetric's Skylines podcast (citymetric.com/content/skylines-podcast)

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