page_title: Palace of Westminster
section_title: Security
hierarchical_section_title: Palace of Westminster / Security
caption_attribution_description: English: The Palace of Westminster Seen from Abingdon Street.
context_page_description: The Palace of Westminster serves as the meeting place for both the House of Commons and the House of Lords, the two houses of the Parliament of the United Kingdom. Informally known as the Houses of Parliament after its occupants, the Palace lies on the north bank of the River Thames in the City of Westminster, in central London, England.
  Its name, which derives from the neighbouring Westminster Abbey, may refer to several historic structures but most often: the Old Palace, a medieval building-complex destroyed by fire in 1834, or its replacement, the New Palace that stands today. The palace is owned by the monarch in right of the Crown and, for ceremonial purposes, retains its original status as a royal residence. Committees appointed by both houses manage the building and report to the Speaker of the House of Commons and to the Lord Speaker.
  The first royal palace constructed on the site dated from the 11th century, and Westminster became the primary residence of the Kings of England until fire destroyed the royal apartments in 1512.
context_section_description: The Gentleman Usher of the Black Rod oversees security for the House of Lords, and the Serjeant at Arms does the same for the House of Commons. These officers, however, have primarily ceremonial roles outside the actual chambers of their respective Houses. Security is the responsibility of the Parliamentary Security Director. Parliament has its own professional security force. Tradition still dictates that only the Serjeant at Arms may enter the Commons chamber armed.
  With rising concern about the possibility that a vehicle full of explosives could be driven into the building, a series of concrete blocks was placed in the roadway in 2003. On the river, an exclusion zone extending 70 metres (77 yd) from the bank exists, which no unauthorised vessels are allowed to enter.
  The Serious Organised Crime and Police Act 2005 formerly made it illegal to hold a protest near the Palace, or anywhere else within a designated area extending up to 1 kilometre (0.6 mi) from Parliament Square, without authorisation from the Metropolitan Police. The Act also restricted the operation of loudspeakers in the designated area. These provisions were repealed by the Police Reform and Social Responsibility Act 2011, which replaced them with a total ban on tents and sleeping bags in Parliament Square, as well as a prohibition on the use of loudspeakers in the Square without permission from the relevant local authority.
  Members of the public continue to have access to the Strangers' Gallery in the House of Commons. Visitors pass through metal detectors and their possessions are scanned. Police from the Palace of Westminster Division of the Metropolitan Police, supported by some armed police from the Diplomatic Protection Group, are always on duty in and around the Palace.
caption: Concrete barriers restrict access to Old Palace Yard.
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