Throughout her short life, Diana, Princess of Wales undertook many hundreds of engagements on behalf of charities and engagements.

During her marriage, The Princess was President or Patron of over 100 charities.

The Princess did much to publicise work on behalf of homeless and also disabled people, children and people with HIV/AIDS.

Following her divorce from The Prince of Wales in 1996, The Princess remained Patron of Centrepoint (homeless charity), English National Ballet, Leprosy Mission and National Aids Trust.

The Princess was also President of the Hospital for Sick Children, Great Ormond Street and of the Royal Marsden Hospital.

In the year before her death, aged 36, the Princess was an active campaigner for a ban on the manufacture and use of land mines.

In January 1997, she visited Angola as part of her campaign. In June, the Princess spoke at the landmines conference at the Royal Geographical Society in London, and this was followed by a visit to Washington DC in the United States on 17/18 June to promote the American Red Cross landmines campaign (separately, she also met Mother Teresa in the Bronx, New York).

The Princess's last public engagements included her visit to Bosnia from 7 to 10 August, when she visited landmine projects in Travnic, Sarajevo and Zenezica.

In 2007 Prince William and Prince Harry organised Concert for Diana, a unique tribute to their mother held at Wembley Stadium.

The concert, held on 1 July, what would have been The Princess's 46th birthday, was held in front of a 62,000 crowd in the stadium and watched on television by millions more people around the world.

Although the event was first and foremost a tribute concert, both Prince William and Prince Harry were keen that any proceeds should be shared among the eight charities which they had selected to be beneficiaries of at least £150,000.

The charities to benefit included Diana, Princess of Wales Memorial Fund, which was founded after The Princess’s death; Sentebale, the Lesotho children’s charity which Prince Harry founded in memory of his mother; and the six organisations of which the Princess was Patron at the time of her death: the Royal Marsden and Great Ormond Street Hospitals, Centrepoint (of which Prince William is now Patron), The Leprosy Mission, The National AIDS Trust and English National Ballet, who also performed at the concert.