The following excerpts are from the book 'Diana, fashion & style'
'Diana was never fearful of promoting what were seen as being ‘difficult’ causes, such as leprosy and AIDS, or politically sensitive issues such as landmines. After a visit to Nigeria in 1990 where Diana met people who had been crippled by leprosy, she became patron of the Leprosy Mission. The following year she was made patron of the National Aids Trust.'
'In 1992, to the great distress of the Princess, it became impossible to disguise the fact that her marriage to the Prince of Wales had broken down…The Princess realized that her effectiveness at promoting the work of many of her charities would be compromised by her change in status and she resigned from over a hundred of them. However, there were six concerns where she felt she could still have a role to play. These were Centrepoint – a charity for the homeless – the National AIDS Trust, the Leprosy Mission, the English National Ballet, Great Ormond Street Hospital for Sick Children and the Royal Marsden Hospital specializing in cancer research and treatment. For these charities the Princess continued to work energetically.'