Charlotte is the half-sister of the writer John Le Carré (whose real name is David Cornwell ), of whom she says "He's the best brother a girl could have". Their father Ronnie Cornwell (1906-75) was married at least three times and has been described as "an epic con man of little education, immense charm, extravagant tastes, and no scruples". Ronnie was a larger-than-life character...