Pan Britannica Industries Ltd (PBI) was a small company which had 400 employees. It was a household and agrochemical formulation company based at Britannica House, Stewardstone Road, Waltham Cross and with a distribution presence in Wisbech in Cambridgeshire. PBI was, in common with many other UK household names, both a manufacturer and marketing organisation for both agricultural and horticultural products. Dr Hessayon still writes Expert books but these are now published by Transworld.