House of Commons of the United Kingdom canister of chlorobenzylidene malonitrile (tear gas). Even members have been known to disturb proceedings of the House. For instance, in 1976, Conservative MP Michael Heseltine seized and brandished the Mace of the House during a heated debate. However, perhaps the most famous disruption of the House of Commons was caused by Charles I, who entered the Commons Chamber in 1642 with an armed force to arrest five members for high treason. This action was deemed a breach of the privilege of the House, and has given rise to the tradition that the monarch does not set foot in the House
House of Commons of the United Kingdom John Bercow, has chosen to wear a gown over a lounge suit, a decision that has sparked much debate and opposition. The Speaker or deputy presides from a chair at the front of the House. This chair was designed by Augustus Pugin, who initially built a prototype of the chair at King Edward's School, Birmingham: that chair is called Sapientia and is where the chief master sits. The Speaker is also chairman of the House of Commons Commission, which oversees the running of the House, and controls debates by calling on members to speak. A member who believes that a