After collapsing at a House of Lords dinner, Thatcher, suffering low blood pressure, was admitted to St Thomas' Hospital in central London on 7 March 2008 for tests. In 2009 she was hospitalised again when she fell and broke her arm. Thatcher returned to 10 Downing Street in late November 2009 for the unveiling of an official portrait by artist Richard Stone, an unusual honour for a living former prime minister. Stone was previously commissioned to paint portraits of the Queen and Queen Mother.