Equal Protection refers to the idea that a governmental body may not deny people equal protection of its governing laws. The governing body state must treat an individual in the same manner as others in similar conditions and circumstances.
Equal protection under the law means that a persons similarly situated must be similarly treated, and they must treat an individual in the same manner as others in similar conditions and circumstances.
While including the typical barons and knights, Simon de Montfort had also included burgesses (originally a freeman of a borough) from influential towns.