How can we make practical use of the COM-B (Capability, Opportunity, Motivation - Behaviour) Model when developing behaviour change interventions? The answer is the CACTIS (COM-B Assessment To Intervention Strategy) tool! It was CACTISS with 'Spreadsheet' at the end, but since the podcast, a decision has been made to drop the last S because although the original version was a spreadsheet, the new improved version (watch this space) will be a more interactive website.