1. Mourne National Park Boundary Recommendations;Alison Farmer Associates and Julie Martin Associates,2005
2. Valuing Wales’ National Parks;Arup for National Parks Wales,2013
3. Scotland’s Environmental Laws since Devolution—from Rhetoric to Reality;Bailey,2010
4. Out of the wilderness? Achieving sustainable development within Scottish national parks;Barker;J. Environ. Manag.,2008
5. BBC, 2013. National Trust defends Giant’s Causeway visitor charge. Available at: (accessed: 27.07.13.).