Michael Heap is a clinical and a forensic psychologist who started in clinical psychology in 1974. He has also held part-time teaching and lecturing posts at universities. He is the Chairman/Secretary and a founder member of ASKE, the Association for Skeptical Enquiry. He is Honorary Lecturer Department of Clinical Psychology, University of Sheffield, and an Editorial Consultant for the International Journal of Clinical and Experimental Hypnosis. He has published many articles skeptical of the claims of Neurolinguistic programming.
There is a list of Heap's articles on NLP here. Ironically, Heap comments there that 'For a sceptical up-to-date account of NLP go to the Wikipedia website'. He was obviously referring to the 2005 version of the Wikipedia article on NLP, the one that begins "Neuro-Linguistic Programming (NLP) is a collection of self-help recommendations, promoted through the popular psychology and self development sections of bookshops, and advertised in various media including the Internet and infomercials", and which mentions Heap's work in the introduction, and not the December 2007 version which only mentions Heap's work in a footnote.