“…Existing literature highlights a growing range of police multiagency approaches that address terrorism, radicalisation, and/or extremism (e.g., see Butt & Tuck, 2014 ; Wise, Roberts, Formosa, & Chan, 2018 ). We anticipate that studies captured under the review of intervention effectiveness (Objective 1) will utilise quasiexperimental research designs (e.g., Williams, Horgan, & Evans, 2016 ).…”