"The National Risk Assessment (NRA) is a classified cross government document which incorporates expertise from a wide range of departments and agencies. It assesses the impact and likelihood of the major risks, both hazards and threats, that the country could face over a five year period, enabling prioritisation of the UK's planning for emergencies.... Understanding the risks and determining their relative significance in terms of potential impact is the starting point for emergency planning. The key to turning this into useful planning information is remembering that it is not the risks themselves that people have to deal with when things go wrong, but their consequences". (UK Cabinet Office. The Risk Register, 2008, 4).