The Ottawa Rules were developed in 1992 by Stiell et al. to “assist clinicians in being more selective in their use of radiography” in suspected ankle fractures. They have a sensitivity of almost 100% and should reduce the number of unnecessary radiographs by 30–40%. We aimed to determine the application of the Ottawa Rules in ankle plain radiograph requests in Accident and Emergency (A&E) and determine the number of unnecessary plain radiographs requests. We carried out a retrospective analysis of 366 ankle plain radiographs, request forms and reports, in A&E over 3 months. We implemented a reminder on the electronic requesting system to prompt clinicians to apply the Ottawa rules and analysed a further 226 scans over the next month. Unnecessary scans were calculated by determining the false negatives. i.e. requests did not fulfil Ottawa Rules and scan showed no fracture. Of the 336 original requests, 45% fulfilled the Ottawa Rules and 43% of all scans were unnecessary. Following our intervention, only 42% of requested scans fulfilled the Ottawa rules and 52% were unnecessary. We concluded that Ottawa rules are knowingly not applied in A&E. Reasons may include low cost and ease of scan, patient and clinician reassurance and perceived low risk of scanning. There are a huge number of unnecessary ankle plain radiographs and soft interventions do not impact on this. We have implemented a simplified version of the text reminder and are re-auditing the data.