How did medieval English gatherings of important people contribute to the development of Parliament?

Medieval English gatherings of important people were instrumental in the evolution of Parliament through the following developments:

• Consultation and Taxation: Kings frequently summoned the Magnum Concilium (Great Council) of magnates and the Curia Regis (King’s Court) to seek financial support, or aid, for wars and state expenses. These meetings established a precedent where the crown negotiated with various segments of the population to secure necessary funds.123
• Broadening Representation: Over the 13th century, these assemblies expanded beyond high-ranking nobles and clergy. To secure broader consent for taxation, kings began summoning knights from shires and burgesses from towns to appear alongside the magnates. This culminated in the Model Parliament of 1295, which included representatives from the lower clergy, knights, and burgesses, marking a turning point toward a representative system.21
• Institutionalization: These gatherings evolved from informal discussions into formal legislative bodies. As the judicial functions of the Curia Regis became distinct, the assembly transitioned into a legislative forum where petitions, or "bills," were framed by members. Eventually, the practice of debating in separate chambers—the lords and the commons—solidified the structure of the modern British Parliament.2