People who are marginalised (medically underserved) experience significant health disparities and their voices are often 'seldom heard'. Interventions to improve professional awareness and engagement with these groups are urgently needed. This study uses a co-production approach to develop an online digital educational intervention in order to improve pharmacy staffs' intention to offer a community pharmacy medication review service to medically underserved groups.Before/after (3 months) self-completion online questionnaire.Community pharmacies in the Nottinghamshire (England) geographical area.Community pharmacy staff.Online digital educational intervention.The primary outcome measure was 'behaviour change intention' using a validated 12-item survey measure. The secondary outcome measure was pharmacist self-reported recruitment of underserved groups to the medication review service.All pharmacies in the Nottinghamshire area (n=237) were approached in June 2017 and responses were received from 149 staff (from 122 pharmacies). At 3 months (after completing the baseline questionnaire), 96 participants (from 80 pharmacies) completed a follow-up questionnaire, of which two-thirds (n=62) reported completing the e-learning. A before/after comparison analysis found an improving trend in all the five constructs of behaviour change intention (intention, social influence, beliefs about capabilities, moral norms and beliefs about consequences), with a significant increase in mean score of participants' 'beliefs about capabilities' (0.44; 95% CI 0.11 to 0.76, p=0.009). In the short-term, no significant change was detected in the number of patients being offered and the patient completing a medication review.Although increases in the numbers of patients being offered a medication review was not detected, the intervention has the potential to significantly improve pharmacy professionals' 'beliefs about capabilities' in the short-term. Wider organisational and policy barriers to engagement with marginasied groups may need to be addressed. Future research should focus on the interplay between digital learning and practice to better identify and understand effective practice change pathways.