concerning his family and other matters, from 1984 or thereabouts. 59. Delusional ideas are fixed or unshakeable beliefs formed on the basis of the altered internal reality of the mentally ill, psychotic, individual, and may not correspond at all to the world as other people see it. … Delusional ideas are not open to reassurance or rational argument and may exert an undue influence on the person’s life. 60. In my opinion, based on the material that I have seen, it is very likely indeed that Mr Kostic suffered from a mental disorder, namely Delusional Disorder according to DSM-IVTR … The essence of Delusional Disorder is a highly organised delusional system, largely encapsulated from normal aspects of the personality.” 162. Dr Reveley goes on to describe the diagnostic criteria for DSM-IV-TR Delusional Disorder. She points out that the delusions may be highly variable in content, and that other symptoms of psychopathology are characteristically absent. The onset of Delusional Disorder is variable, but commonly occurs in middle age. Little is known about its causes, but its onset may be provoked by influences such as head injury, alcohol abuse, or the ill effects of drugs, as well as hereditary factors. She refers to the diagnosis of paranoia by Dr Radivojevic, who saw Bane in 1984, and confirms that “paranoia” is the old term for Delusional Disorder: the underlying condition described by both terms is the same. The drug which Dr Radivojevic prescribed for Bane, Hemineurine, is a sedative which would have had little effect on his underlying condition. 163. With regard to Bane’s testamentary capacity, Dr Reveley says this in paragraph 71 of her first report: “Concerning his testamentary capacity, however, Mr Kostic was mentally impaired, in my opinion. Mr Kostic had delusions particularly in relation to his family, and did not even consider that his family were, in fact, related to him. In my opinion it is likely that his capacity to make rational decisions regarding the disposal of his property was grossly impaired.” She says that in her opinion it is likely that Bane’s testamentary capacity was affected by the time he made the 1984 Codicil, and it certainly was by the time when he made the 1988 and 1989 Wills. She considers that Bane remained deluded from the early 1980s onwards, and although his condition may have waxed and waned in intensity, his delusions would have been apparent to any interviewing psychiatrist. 164. In her second report Dr Reveley gives details of the further documents she has seen, and quotes extensively from them. They include Bane’s letters to Mr Trower, Mrs Thatcher and Mr Mellor, and a long letter to “Otmar” describing his “escape” from Switzerland in 1984. They also include Bane’s diary. She then refers to the defendants’ witness statements, and in paragraph 73 says that the additional material confirms the view expressed in her first report. She refers to the DSM-IV-DR