That no man can be arrested by the King in person is equally clear.

This was an established maxim of our jurisprudence even in the time of Edward the Fourth.

'A subject,' said Chief Justice Markham to that Prince, 'may arrest for treason; the King cannot; for, if the arrest be illegal, the party has no remedy against the King.'"[54] Both King and Parliament broke rudely through all constitutional precedents in their preparations for hostilities.
The King levied troops by a royal commission, without any advice from Parliament, and Pym got an ordinance passed, in both Houses, appointing the Lords-Lieutenant of the counties to command the Militia without warrant from the Crown.
A last attempt at negotiations was made at York, in April, when the proposals of Parliament--nineteen propositions for curtailing the power of the Monarchy in favour of the Commons--were rejected by Charles with the words: "If I granted your demands, I should be no more than the mere phantom of a king." By August, Charles had raised the royal standard at Nottingham, and war was begun.
Five years later and Charles was a prisoner, to die in 1649 on the scaffold.

That same year monarchy and the House of Lords were abolished by law; the Established Church had already fallen before the triumphant arms of the Puritans.
Then, in 1653, the House of Commons itself fell--expelled by Cromwell; and the task of the Lord Protector was to fashion a constitution that would work.[55] What happened was the supremacy of the army.

Parliament, attenuated and despised, contended in vain against the Protector.