Risk assessment

Risk assessment is used to assess the risk of a non-native species entering, establishing, spreading and causing impacts in GB.  These pages provide information on GB risk assessment scheme developed and used in GB.  Completed risk assessments are also posted here.  A modified version of the GB scheme is used for risk assessment within the EU - links to this scheme are also available here.

Templates for EU risk assessment:


Risk assessment is a key tool in the armoury against invasive non-native species


It can be used to aid prioritisation, to help enable effective rapid responses and for underpinning decision-making.  The Non-native Risk Assessment (NNRA) scheme was established in December 2006 (Baker et al 2008, Mumford et al 2010).  Within this scheme risk assessments on non-native species are carried out by independent experts, which are then reviewed by one peer reviewer and GB's independent panel of risk analysis experts (known as the NNRAP).  Following this process risk assessments are available for comment before being finalised.


Common misconceptions about risk assessments:

To address a number of common misconceptions about non-native species risk assessments, the following points should be noted:

  • Risk assessments consider only the risks posed by a species. They do not consider the practicalities, impacts or other issues relating to the management of the species. They therefore cannot on their own be used to determine what, if any, management response should be undertaken.
  • Risk assessments are advisory and therefore are part of the suite of information on which policy decisions are based.
  • Completed risk assessments are not final and absolute. They are an assessment based on the evidence available at that time. Substantive new scientific evidence may prompt a re-evaluation of the risks and/or a change of policy.


For those undertaking risk assessments:


Period for comment

The risk assessments that have completed the process are available from these pages.  They are open for stakeholders to provide comment on the scientific evidence which underpins them for three months from the date of posting on this website (to send in your comments contact us here).

If you would like to be informed when new risk assessments are put online, contact us here and ask to be put onto the risk assessment alert e-list.


Risk assessments

Click here to email your comments on the risk assessments.


Other Risk Assessment Schemes

The European and Meditteranean Plant Protection Organisation (EPPO) carries out pest risk analysis at the European and Meditteranean scale for plant pests and a range of invasive plants.


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