Well, your #highness. What can we do to help you? #england #uk #rules

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The citizens of London, through the Corporation of the City, still retain their ancient privilege of being able to bar the Sovereign from entering their streets. Technically, before Her Majesty may enter the boundaries of the City, she must seek the formal permission of the Lord Mayor and on State occasions this colourful ceremony is usually carried out at Temple Bar, near the Law Courts. The custom goes back to the days when London was a walled city whose gates were closed at the order of the Lord Mayor.

The ceremony is now symbolic as the ancient walls and old Temple Bar no longer exist. When the Royal carriage is about to cross the boundary of the City of Westminster to enter the City of London, the Sovereign is challenged by the Lord Mayor, the City Marshal and the Aldermen.

Source: http://www.experts123.com/q/is-the-british-queen-regnant-reigning-king-allowed-into-the-city-of-london.html