A third runway for Heathrow?

The argument about whether a third runway should be built at Heathrow has been reignited after the MP Tim Yeo called on David Cameron to "start a new era".

Business leaders would welcome the move, and proposed sites for new airports such as Grain in Kent could be spared development. But many remain unhappy at the prospect of expansion for the west London site. David Johns reports.

David Johns spoke to Tim Yeo MP and the Secretary of State for Transport Justine Greening.