Short answers, pulled from the story.
Simon de Montfort invited common townsmen to sit in a royal council in the year 1265. This event occurred during the Second Barons' War as a political maneuver to secure power after winning the Battle of Lewes.
The House of Commons of England split into a separate entity from the nobility and clergy in the year 1341. This division occurred during the reign of Edward III and established the Lower Chamber distinct from the House of Lords.
Peter de la Mare served as the first Speaker of the House of Commons of England in 1376. He delivered grievances to the Lords during the Good Parliament of 1376 and was released after the death of King Edward III to serve again in 1377.
The House of Commons of England represented the foreign borough of Calais from 1372 until 1558. Calais served as a borough constituency until it was ceded to the Kingdom of France in 1558.
The House of Commons of England ceased to exist and became the House of Commons of Great Britain after the Act of Union in 1707. This transition marked the end of the English Parliament and the beginning of the British Parliament.