Background: Acute otitis media (AOM) is a common painful infection in children, with around 2.8 million cases presenting to primary care in England and Wales annually. Nearly all children who present to their general practitioner (GP) with AOM or AOM with discharge (AOMd) are treated with oral antibiotics. These can cause side effects; contribute to the growing problem of antimicrobial resistance, and more rarely, allergic reactions. Alternative treatments, such as an antibiotic eardrops or “delayed” oral antibiotics, could be at least as effective and safe as immediate oral antibiotics for children with AOMd.Methods: REST is a pragmatic, three-arm, individually randomised, non-inferiority trial being conducted in 50 GP practices across the UK. The study aims to recruit 399 children aged (≥12m and <16yrs) presenting to their GP with AOMd. Children will be randomised to one of three arms: immediate ciprofloxacin 0.3% eardrops; delayed oral amoxicillin (clarithromycin if penicillin allergic); or immediate oral amoxicillin (clarithromycin). Recruitment, including eligibility screening, randomisation and data collection, are conducted using the innovative, TRANSFoRm electronic trial management platform. Integrated within the primary care electronic medical records it provides automatic eligibility checking, part-filling of e-CRFs, study workflow management and routine NHS follow up data collection. The primary outcome is time to resolution of all significant symptoms and will be collected by the parent using a Symptom Recovery Questionnaire (SRQ). Secondary outcomes, including cost-effectiveness, duration of moderately bad or worse symptoms and repeat AOMd episodes, will be collected at day 14 and at 3 months. Discussion: It is unclear whether prescribing oral antibiotics to children with AoMd results in a reduction in symptoms or a shorter duration of illness. The REST trial will allow us to compare the non-inferiority of: immediate topical ciprofloxacin ear drops, or delayed oral amoxicillin (clarithromycin) against immediate oral amoxicillin (clarithromycin). We aim to recruit 399 patients from 175 practices in the UK. Using the Transform software to randomise participants to the trial will enable recruitment for a relatively uncommon condition. Trial registration:Name of Registry: ISCRTNRegistration Number: ISRCTN12873692 This contains all items required to comply with the World Health Organization Trial Registration Data SetDate of Registration: 24th April 2018 http://www.isrctn.com/ISRCTN12873692Name of Registry: EudraCT Registration Number: 2017-003635-10Date of Registration: 6TH September 2017