58 Thirdly, as I have mentioned, the appellant appears, at least for a time, to have been under the impression that the mere extension of the validity of a writ has the automatic consequence that a prior service of the writ, effected when the writ was stale, is itself retrospectively validated. This proposition is incorrect. Order 7 r 3 provides that before an extended writ is served "it must be marked with an official stamp showing the period for which the validity of the writ has been so extended". This sub-rule therefore assumes that there is a need for an extended writ to be served afresh (marked with an official stamp, as stipulated) and assumes that service of a stale writ is of no effect. The inference is that, while under O 7 r 1 a writ may be retrospectively validated, O 7 does not empower the Court to validate retrospectively the service of a stale writ. In Kleinwort Benson Ltd v Barbrak Ltd Lord Brandon observed (at 616) that, "[i]n category (3) cases ... it is not possible for the plaintiff to serve the writ effectively unless its validity is first retrospectively extended". Nevertheless, it seems to me that, as the service of a writ that is invalid for the purposes of service is an irregularity, the broad remedial powers available under O 2 r 1 would enable a court, in an appropriate case (and subject to the criterion that without remedial relief injustice will occur), to cure that irregularity. However, an order retrospectively validating a stale writ would not automatically have the effect of validating a service of the stale writ. The circumstances and consequences of the retrospective validation of the irregular service might be quite different from those applicable to the retrospective validation of the writ. For the irregular service to be validated, a specific order to that effect would be required.