Girl, 10, raises £60,000 for war veterans
13 November 2011 Last updated at 10:50 GMT
The Queen will lead the annual Remembrance Sunday ceremony in Whitehall when she lays a wreath at the Cenotaph.
She will be joined by senior politicians, religious leaders and military chiefs in commemorating members of the armed services who have given their lives in armed conflicts.
Lydia Cross, 10, will also be joining the march past, having raised £60,000 for war veterans.
The BBC's Nick Higham reports.