 In August 2008, four of her relatives were killed in a safari bus crash in South Africa, and she was given indefinite leave from filming "Terminator Salvation", returning later to complete filming.In early October 2008, it was reported that Bonham Carter had become a patron of the charity Action Duchenne, the national charity established to support parents and sufferers of Duchenne muscular dystrophy.In August 2014, Bonham Carter was one of 200 public figures who were signatories to a letter to "The Guardian" opposing Scottish independence in the run-up to September's referendum on that issue.