From a methodological perspective, I am interested in maximising the efficiency of, and information obtained from, clinical trials of complex interventions, such as, but not restricted to, psychotherapy. Within this broad area I’m interested in treatment-related clustering (e.g. ‘therapist effects’) in trials, meta-analyses and observational data. More recently, my interests have extended to novel experimental designs (e.g. split-block designs, split-plot designs, multi-tiered designs, conditional randomisations, open-cohort cluster-randomised trial designs) and combinations of those designs, building on Design of Experiments (DoE). I am also interested in the role of time in trials of complex interventions. From a trials perspective, I’m interested in building a portfolio of trials that evaluate psychological interventions and audit and feedback, particularly in a mental health setting. However, she has developed an interest in all types of complex intervention, where my interest is in supporting the implementation of innovative trial designs across the Clinical Trials Research Unit.