Given the question: What is the full name of the person whose wife was Karen Lancaster?  Answer the above question based on the context below:  In Osbert: A Portrait of Osbert Lancaster, Boston comments that after the dramatic events in Athens his subject's later life was uneventful and industrious with "a somewhat dismaying dearth of rows, intrigues, scandals or scrapes to report." The Lancasters had a Georgian house in Henley-on-Thames, and a flat in Chelsea, where they lived from Mondays to Fridays. He worked at home in the mornings, on illustrations, stage designs, book reviews and any other commissions, before joining his wife for a midday dry martini and finally dressing and going to one of his clubs for lunch. After that he would walk to the Express building in  Fleet Street at about four in the afternoon. There he would gossip with his colleagues before sitting at his desk smoking furiously, producing the next day's pocket cartoon. By about half-past six he would have presented the cartoon to the editor and be ready for a drink at El Vino's across the road, and then the evening's social events.Karen Lancaster died in 1964. They were markedly different in character, she quiet and home-loving, he extrovert and gregarious, but they were devoted to each other, and her death left him devastated. Three years later he married the journalist Anne Scott-James; they had known each other for many years, although at first she did not much like him, finding him "stagey" and "supercilious". By the 1960s they had become good friends, and after Karen died the widowed Lancaster and the divorced Scott-James spent increasing amounts of time together. Their wedding was at the Chelsea Register Office on 2 January 1967. After their marriage they kept his Chelsea flat,  and lived at weekends in her house in the Berkshire village of Aldworth, the house in Henley having been sold.
The answer is:
Osbert Lancaster