Chapter 15 describes key issues in using low intensity (LI) cognitive behavioural therapy (CBT) interventions for anxiety disorders. Treatment protocols for anxiety disorders were originally developed for high intensity (HI) interventions, which unlike LI interventions, traditionally involve high levels of therapist contact and are usually presented via a face-to-face format. It is therefore important to identify how best to modify treatment protocols for effective and acceptable use in LI interventions, which involve limited therapist contact and may be administered remotely.