Hayley Marshall PTSTA(P) is a UK based TA psychotherapist, supervisor, and trainer with 25 years clinical experience. Working outside for the past 13 years Hayley is a clinical specialist in outdoor therapy, having been instrumental in some pioneering developments in the field. She co-authored a ground-breaking article on the outdoor therapeutic frame in the European Journal of Psychotherapy in 2010 and has since written several book chapters on clinical outdoor practice including one on trauma published in July 2020.

She currently offers outdoor psychotherapy & supervision, along with a variety of ecological training courses for therapists at The Centre for Natural Reflection in the Peak District.