Commenting ahead of the expected announcement tomorrow on a consultation over the construction of a third runway at Heathrow Natalie Evans, Head of Policy at the British Chambers of Commerce, said:“The economic case for a third runway is clear and the Government must stand firm and deliver the necessary expansion.  The British economy is being held back by transport infrastructure that is not fit for purpose.  The  expansion at Heathrow is one of the infrastructure projects necessary to keep the country competitive.   Continental airports have far bigger capacities and the UK is in danger of losing out on being a major hub for international flights. “It is the bane of British infrastructure projects that they are held up by the planning system and a lack of political will to implement them.  The proposed planning reforms should hopefully speed up the process and the Government must press the case for expansion and deliver the necessary third runway.”