DAVID ASTON, B.Sc., MSc., Ph.D., NDB is a biologist and a Master Beekeeper having kept bees continuously for 40 years in the East Riding of Yorkshire. He holds the National Diploma in Beekeeping (NDB), has been Board Chairman and a current member of its Executive. He has contributed to the work of the British Beekeepers' Association (BBKA) for many years and has served as Chair of Trustees and is now a Past President. He is also a Trustee of the CB Dennis British Beekeepers' Research Trust. SALLY BUCKNALL, B.Sc., M.Sc., Ph.D., CBiol. is a biologist and environmentalist. She has been a Trustee and Chair of Trustees for the charity Garden Organic (Henry Doubleday Research Association, HDRA). This husband and wife team have published two other books.