“9. It would be a wholly exceptional case in which a claimant could postpone the effective quashing of the decision which he sought to have quashed in order that he might at some later stage bring a different challenge in respect of a different decision based on different evidence without having to go through the necessary applications, including payment of fees, for the purposes of challenging that further decision and should thereby evade the filter mechanism and simply take his place on a seemingly adjourned renewal application. Such a process has occurred in cases where permission has been granted or a renewal hearing is awaited, with the upshot being a series of letters which may or may not constitute the decision letter, further representations often addressed to the court rather than the Secretary of State by way of unamended grounds of challenge, amended grounds of challenge which are expressed in skeleton arguments without formal amendment and real difficulty for the court in knowing what is the focus of the challenge, what are the grounds that are relied on and what material can lawfully be admitted in order to show that there was an error of law. And due fees are left unpaid. 10. It is too often that these cases have come before the court at a point where the hearing is no more than an interruption in the process of the exchange of correspondence between the Secretary of State and the claimant. This makes for a wholly unsatisfactory process of litigation.”