© Licensed to London News Pictures. 05/10/2016. LONDON, UK.  A ceremony to formally install General Sir Nicholas Houghton, the ex-Chief of the Defence Staff, as the 160th Constable of the Tower of London is held at the Tower of London. The Constable is the most senior appointment at the Tower, which is a royal palace and fortress. General Sir Nicholas will be the Queen's representative within the Tower of London and its formal custodian and he will succeed the current incumbent General the Lord Richard Dannatt GCB CBE MC DL, whose appointment expires on 31 July 2016..  Photo credit: Vickie Flores/LNP
{}