 Complete the following phrase:  Tindall has appeared at events for The Caudwell Charitable Trust, which targets children with special needs, disabilities and serious illnesses. In 2006, she took part in a special charity day for Cantor Index, whose staff were killed in the 11 September 2001 attacks. In 2007, she became patron of the Mark Davies Injured Riders Fund. To help with Sport Relief 2008, she posed for a portrait by artist Jack Vettriano. In 2009, she attended a celebrity poker tournament in Monaco in aid of Darfur, Sudan. In October 2010, she attended a celebrity poker tournament in London, in aid of Cancer Research UK, of which she is patron. In 2011, she auctioned another evening gown in aide of the 