Why is the Queen not allowed in House of Commons?

Online Answer
The monarch is forbidden to enter the House of Commons as part of a parliamentary convention dating back to King Charles I in the 17th century. In January 1642, Charles I came to the Commons with several armed men to arrest five MPs for treason. Luckily for them, they had anticipated this and had already fled.
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The monarch is forbidden to enter the House of Commons as part of a parliamentary convention dating back to King Charles I in the 17th century. In January 1642, Charles I came to the Commons with several armed men to arrest five MPs for treason. Luckily for them, they had anticipated this and had already fled.