Advice involves immediate 'rapid-response' actions to initiate containment along with preventative strategies, measures for control and monitoring requirements post-control. The manual responds to the GB Non-Native Species Strategy and deals with over 40 species which have been selected from plants listed in Schedule 9 of the Wildlife & Countryside Act 1981 (as amended) for the UK; invasive alien species of EU concern (as per EU IAS Regulation 1143/2014); and other noteworthy species of the urban environment, for example butterfly-bush (buddleia). Each species account includes: a brief description on ecology and identification with corresponding photographs; a distribution map for the British and Irish Isles; immediate actions that can be taken once identified; pathways of spread; lifespan; seed-production age; seed longevity; growth rate; a 'schematic' of the life-cycle aimed at assisting the determination of schedules for survey and treatment; prevention and rapid-response measures; tables of control, management and herbicide treatment linked to decision-making flow diagrams; waste-disposal requirements; revegetation post-management; and continued monitoring. Key references to published data and links to appropriate websites are also included.