Penny Tompkins and James Lawley have both been UKCP registered neurolinguistic psychotherapists since 1993, supervisors, coaches in business and certified NLP trainers. They co-authored, Metaphors in Mind: Transformation through Symbolic Modelling and a training DVD, A Strange and Strong Sensation. They are the founders of The Developing Company and creators of Symbolic Modelling, using the Clean Language of David Grove.

Wendy Sullivan is a Speech and Language Therapist and certified NLP trainer. She works as a psychotherapist, coach and trainer of Symbolic Modelling. She runs free teleclasses for people new to Clean Language and has co-authored an introductory book, Clean Language: Revealing Metaphors Opening Minds Visit www.cleanchangecompany.com for information about training in Symbolic Modelling with Wendy, Penny and James.