--- - |2+ Background Many CAMHS teams across the United Kingdom are now required to use Routine Outcome Monitoring (ROM). However, some clinicians hold negative attitudes towards ROM and various practical implementation issues have been identified. Method The aim of this study was to explore clinician experiences of using ROM in the context of an ‘enforced’ initial implementation initiative. Twenty clinicians were surveyed at the beginning (T1) and end (T2) of the six‐month period in a large UK CAMHS network adopting CYP‐IAPT practice. Changes in the use of and attitudes towards ROM were investigated, as well as barriers to implementation. Results Overall, a small but significant increase in clinician use of ROM was observed from T1 to T2, but attitudes towards ROM did not change significantly. On the whole, clinicians were more positive than negative about ROM during the implementation period, but key implementation challenges included clinician concerns about the value and (mis)use of ROM data, poor technological support and additional workload demands. Conclusions CAMHS clinicians will not necessarily become more receptive to ROM simply as a by‐product of being asked to use it more. Seeking clinician feedback at the early stages of implementation can help provide a focus for improvement efforts. Ideas for future research and important limitations of the study are discussed. - Child and Adolescent Mental Health, Volume 23, Issue 4, Page 328-333, November 2018.