TARDIS Cameo Olympics 2012 London

The sound of the TARDIS engines were heard during the Bohemian Rhapsody  sequence at the opening ceremony of the 2012 Olympic games. Originally a filmed sequence of all 11 Doctors was to be included , but was dropped due to timing issues.

Brand Manager Edward Russell confirmed this via twitter:

A video montage which very briefly showed all 11 Doctors was approved but we were told it may not be included which was clearly the case