Beck, Alison K and Gray, Rebecca M and Wells, Megan and Deane, Frank P and Larance, Briony and Hides, Leanne and Manning, Victoria and Baker, Amanda L and Shakeshaft, Anthony and Dale, Elizabeth and Argent, Angela and Kelly, Peter J (2026) SMART family and friends mutual-help groups: findings from a mixed-methods formative implementation evaluation. Drug and Alcohol Review , 45 , (3) .