We’ve asked leading thinkers, from politics, business and green groups, to set out their one big manifesto idea for the next parliament – the one they think will make a big impact in creating a greener Britain. We are publishing them through May and June.

With six ideas already under the belt, featured in posts on the 16 May and 20 May, today’s three ideas on a local theme come from independent adviser Rebecca Willis, Guy Newey of Policy Exchange and Simon Roberts of the Centre for Sustainable Energy. Read more