Below are found a number of detailed reports on fracking and the exploitation of shale gas, together with other important reference materials.  Click on the links to access these documents.

UKOOG, Community Engagement Charter (January 2014)

DECC, Regulatory Roadmap for onshore oil and gas exploration in the UK (December 2013)

DECC, Strategic Environmental Assessment for further Onshore Oil and Gas Licensing (December 2013)

DECC, Oil and Gas: Petroleum Licensing Guidance (December 2014) (includes assignment, change of licensee etc)

Chemical Industries Association, Shale Gas: The Facts (November 2013)

GOV.UK, Developing shale gas and oil in the UK

UKOOG, Onshore Oil and Gas in the UK (October 2013)

Public Health England, Review of the potential public health impacts of exposures to chemical and radioactive pollutants as a result of shale gas extraction (draft for comment) (October 2013)

PNAS, Measurements of methane at natural gas production sites in the United States (16 September 2013)

Environment Agency, Onshore oil and gas exploratory operations: technical guidance (Consultation draft, August 2013)

Department of Energy and Climate Change, About Shale Gas and Hydraulic Fracturing (Fracking) (30 July 2013)

Department for Communities and Local Government, The Planning Practice Guidance for Onshore Oil and Gas (July 2013) 

UKOOG, UK Onshore Shale Gas Well Guidelines: Exploration and Appraisal Phase (1 February 2013)

Institute of Directors, Getting Shale Gas Working (2013)

EMF, Changing the Game? Emissions and market implications for new natural gas supplies (2013)

UNEP, Gas Fracking: Can we safely squeeze the rocks ? (November 2012) 

Environment Agency, Guidance Note:Regulation of exploratory shale gas operations (November 2012)

HSE/Environment Agency, Working together to regulate unconventional oil and gas developments (November 2012)

AEA, Climate impact of potential shale gas production in the EU (30 July 2012)

Royal Society, Shale Gas Extraction in the UK: a review of hydraulic fracturing (June 2012)

Department for Communities and Local Government, National Planning Policy Framework (March 2012)

IHS Global Insight, The Economic and Employment Contributions of Shale Gas in the US (March 2012)

AEA, Support to the identification of potential risks for the environment and human health arising from hydrocarbons operations involving hydraulic fracturing in Europe (2012)

MIT, Shale gas production: potential versus actual greenhouse gas emissions (2012)

IEA, Golden Rules for a Golden Age of GasWorld Energy Outlook Special Report on Unconventional Gas (2012)

EPA, Investigation of Groundwater contamination near Pavillion, Wyoming (December 2011) 

British Geological Survey, Mineral planning Factsheet – Alternative fossil fuels (2011) 

Tyndall Centre for Climate Change Research, Shale Gas: an updated assessment of environmental and climate change impacts (November 2011)

DECC, The Unconventional Hydrocarbon Resources of Britain's Onshore Basins- Shale Gas (2011) (includes up to 14th licensing round information)

Canadian Society for Unconventional Resources, Understanding Hydraulic Fracturing (2010)

DEFRA, Environmental Permitting Guidance The Mining Waste Directive (Version 1.1, May 2010) 

API, Hydraulic Fracturing Operations – Well construction and integrity guidelines (October 2009) 

HSE, A guide to the Borehole Sites and Operations Regulations 1995 (2nd edition, 2008)

Halliburton, U.S. Shale Gas, An Unconventional Resource: Unconventional challenges (2008) 

Hertfordshire County Council, Planning and Rights of Way (February 2006) 

Lancashire County Council, Joint Lancashire Minerals and Waste Local Plan (various)

UKOOG, UKOOG community engagement charter: Oil and gas from unconventional reservoirs (undated)

For further library resources, you could try here