The general issue of children's mental health has become a growing concern in the UK in recent decades. There has been a specific concern about the increased stringency and pressure of formal educational assessments with some students reported as, experiencing high levels of test anxiety. This paper investigated a school-based test anxiety intervention Beating Exam Anxiety Together (BEAT) developed by educational psychologists from Kent EPS and delivered to two secondary (high) schools in the North-West of England for students aged 15-16 years. No comparison group was used, instead single participant cases were observed at two points: one before the delivery of BEAT and another after the intervention. A mixed methods approach was employed to provide a rich account on how the intervention was delivered. Quantitative data from the experimental study, using the Revised Test Anxiety Scale (RTA), show that 13 out of 14 participants reported a reduction in test anxiety post intervention. Qualitative data strongly support the quantitative findings, highlighting that participants feel better equipped to manage their test anxiety levels and feel better prepared to cope in an exam situation. Implications for pastoral staff supporting in schools, and future research, are considered.