Guardian: Hilary Benn has exposed a potential rift between the government’s transport and environment departments by warning that the UK must not snub EU targets on air quality by pushing ahead with expansion at Heathrow Airport. To many, it had already become clear that the government has no action plan on how to achieve its targets under the EU Air Quality Directive. Yet to persist with its misguided agenda of aviation expansion, there was a fear that it would have to ask for derogation on the …