The King had twice at least summoned its "proctors" to Great Councils before 1295, but it was then only that the complete representation of the Church was definitely organized by the insertion of a clause in the writ which summoned a bishop to Parliament requiring the personal attendance of all archdeacons, deans, or priors of cathedral churches, of a proctor for each cathedral chapter, and two for the clergy within his diocese. The clause is repeated in the writs of the present day, but its practical effect was foiled almost from the first by the resolute opposition of those to whom it was addressed. What the towns failed in doing the clergy actually did. Even when forced to comply with the royal summons, as they seem to have been forced during Edward's reign, they sat jealously by themselves, and their refusal to vote supplies in any but their own provincial assemblies, or convocations, of Canterbury and York left the Crown without a motive for insisting on their continued attendance. Their presence indeed, though still occasionally granted on some solemn occasions, became so pure a formality that by the end of the fifteenth century it had sunk wholly into desuetude.

In their anxiety to preserve their existence as an isolated and privileged order the clergy flung away a power which, had they retained it, would have ruinously hampered the healthy developement of the state. To take a single instance, it is difficult to see how the great changes of the Reformation could have been brought about had a good half of the House of Commons consisted purely of churchmen, whose numbers would have been backed by the weight of property as possessors of a third of the landed estates of the realm. A hardly less important difference may be found in the gradual restriction of the meetings of Parliament to Westminster. The names of the early statutes remind us of its convocation at the most various quarters, at Winchester, Acton Burnell, or Northampton. It was at a later time that Parliament became settled in the straggling village which had grown up in the marshy swamp of the Isle of Thorns, beside the palace whose embattled pile towered over the Thames and the great minster which was still rising in Edward's day on the site of the older church of the Confessor. It is possible that, while contributing greatly to its constitutional importance, this settlement of the Parliament may have helped to throw into the background its character as a supreme court of appeal.

The proclamation by which it was called together invited "all who had any grace to demand of the King in Parliament, or any plaint to make of matters which could not be redressed or determined by ordinary course of law, or who had been in any way aggrieved by any of the King's ministers or justices or sheriffs, or their bailiffs, or any other officer, or have been unduly assessed, rated, charged, or surcharged to aids, subsidies, or taxes," to deliver their petitions to receivers who sat in the Great Hall of the Palace of Westminster.

The petitions were forwarded to the King's Council, and it was probably the extension of the jurisdiction of that body, and the subsequent rise of the Court of Chancery, which reduced this ancient right of the subject to the formal election of "Triers of Petitions" at the opening of every new Parliament by the House of Lords, a usage which is still continued. But it must have been owing to some memory of the older custom that the subject always looked for redress against injuries from the Crown or its ministers to the Parliament of the realm.