questionText: To ask the Secretary of State for Transport, whether she has made a recent assessment of the potential impact of constructing a western rail link to Heathrow Airport on (a) railway capacity on the Great Western Mainline between Paddington and Iver, (b) passenger numbers at Paddington station and (c) car use.
answerText: Any assessment of the impacts described would need to be carried out by the promoters of the Western Rail Link to Heathrow if it were to be required to support the expansion of the airport.    
heading: Heathrow Airport: Railways