does not ordinarily assist the tardy and the indolent or the acquiescent and the lethargic. If there is inordinate delay on the part of the petitioner in filing a writ petition and such delay is not satisfactorily explained, the High Court may decline to intervene and grant relief in the exercise of its writ jurisdiction. The evolution of this rule of laches or delay is premised upon a number of factors. The High Court does not ordinarily permit a belated resort to the extraordinary remedy under the writ jurisdiction because it is likely to cause confusion and public inconvenience and bring in its train new injustices. The rights of third parties may intervene and if the writ jurisdiction is exercised on a writ petition filed after unreasonable delay, it may have the effect of inflicting not only hardship and inconvenience but also injustice on third parties. When the writ jurisdiction of the High Court is invoked, unexplained delay coupled with the creation of third party rights in the meanwhile is an important factor which always weighs with the High Court in deciding whether or not to exercise such jurisdiction. We do not think it necessary to burden this judgment with reference to various decisions of this Court where it has been emphasised time and again that where there is inordinate and unexplained delay and third party rights are created in the intervening period, the High Court would decline to interfere, even if the State action complained of is unconstitutional or illegal. We may only mention in the passing two decisions of this Court one in Ramana Dayaram Shetty v. International Airport Authority of India : (1979) 3 SCC 489 and the other in Ashok Kumar Mishra v. Collector: (1980) 1 SCC 180. We may point out that in R.D. Shetty case , even though the State action was held to be unconstitutional as being violative of Article 14 of the Constitution, this Court refused to grant relief to the petitioner on the ground that the writ petition had been filed by the petitioner more than five months after the acceptance of the tender of the fourth respondent and during that period, the fourth respondent had incurred considerable expenditure, aggregating to about Rs 1.25 lakhs, in making arrangements for putting up the restaurant and the snack bar. Of course, this rule of laches or delay is not a rigid rule which can be cast in a strait jacket formula, for there