evidence: In Northern Ireland, the importance of enhanced biosecurity has been recognised, including the role of the Plant Health Risk Register (led by DAERA) but emphasis remains on support for existing measures. In 2018 the Invasive Alien Species implementation plan was revised but again explicit reference to climate change risks is limited. A recent catalogue of ‘Pests and Pathogens of Trees on the Island of Ireland‘ now provides a good reference source. [...] - The risk magnitude remains high now and in the future in Northern Ireland with more action needed due to the scale of the risk. [...] In Northern Ireland, the magnitude of this risk is medium now and in the future, hence more action is needed.