Dr Peter Bamfield has been involved in colours research and development for over 50 years. Since retiring from full time management in the colour industry, he has maintained an up to date knowledge of the subject area, especially on the newer applications, whilst acting as a freelance consultant to international companies, publishing reviews and presenting papers at colour conferences. He is a Fellow of The Royal Society of Chemistry and a Member of the Society of Dyers and Colourists. He authored a book on Research and Development Management in the Chemical and Pharmaceutical Industry (Wiley-VCH) which has now been published in three editions. Dr Mike Hutchings spent 34 years in research functions in the UK and German chemical industry, mainly in colour-related and computer chemistry areas. For the past 7 years he has been involved in various freelance consultancy roles, some involving colour chemistry and associated businesses, but especially with the Munich company InfoChem on computer aided synthesis developments. He is a Fellow of the Royal Society of Chemistry. His latest applied chemistry interest concerns the cultivation and study of his freshly planted wood of about 2000 native British trees.