The purpose of this paper is to understand the issues facing policing officers when presented with national level change to policy and processes, in one specific area of police business, rape and serious sexual offences (RASSO). Our focus is officer response to the introduction of a new National Operating Model (NOM) in RASSO in England and Wales, and how forces deal with systemic change. We share findings in respect of a national programme of support for the learning, development and wellbeing of officers. Data were collected across a two-year period via interviews, focus groups and masterclasses with officers in five forces. We share the experiences of two forces who are overcoming barriers to begin to navigate change successfully. We share key recommendations from the change framework created for, and embedded within, the NOM.