National policy statement for gas supply infrastructure and gas and oil pipelines (EN-4) / 
Department of Energy and Climate Change. 
 - London :  The Stationery Office,  2011. 
 - ii, 34p. 
<br/><br/> "Presented to Parliament pursuant to section 5(9) of the Planning Act 2008".  "July 2011".  Available online at: http://www.official-documents.gov.uk/document/other/9780108510809/9780108510809.pdf 
<br/><br/><label>ISBN: </label>9780108510809 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Energy industries--Government policy--Great Britain.<br/>Gas industry--Great Britain.<br/>Gas pipelines--Great Britain.<br/>Petroleum pipelines--Great Britain.<br/>Energy industries--Environmental aspects--Great Britain.