Dr Geoff Swinfield has been addicted to genealogy and family history since 1972. He has been a professional researcher for 35 years and since 1999 has run his own genealogical company, Geoff Swinfield Genealogical Services. He has a Ph.D. in Genetics from Nottingham University and has used this training to apply genealogical techniques and sources to the study of families that are at risk from genetic diseases. One of his specialities is locating living relatives and missing people.