Firstly and fore mostly, it is your responsibility not to carry on your person anything or object that is considered prohibited and can raise an alarm, such as a gun, a knife or any other weapon.
Much like at airports, hospitals and hotels, upon entering the City Hall, you are required to walk through a metal detector. Before going through the metal detector make sure to remove any cell phones, keys, coins or anything else made of metal out of your pockets, and place it in the tray usually at the side of the scanner, or with the supervising officer. When you walk through the metal detector, make sure you place your arms close to your body and walk straight through without moving too close to the metal detector’s walls.
If you have any bags on you, place them on the scanner belt so they can go through the scanner.
The London City Hall is open from Mondays to Thursdays from 8.30am to 6pm and Fridays from 8.30am to 5.30pm. You may have to wait in line for the security check on a crowded day.
Public meetings are held in the chamber on the 2nd floor and include assembly meetings and mayor’s monthly questions session.
If you have any questions the telephone number for London City Hall is +44 20 7983 4000