As per case facts, U.P. Jal Nigam cancelled appointments for Assistant Engineer posts, deeming them void ab initio due to irregularities. The High Court quashed this cancellation, citing a breach ... of natural justice for not issuing individual notices and failing to segregate tainted from untainted candidates. The Nigam appealed, seeking to re-work the merit list, and later filed a review, which was also dismissed. The present appeals challenged both High Court judgments, arguing that the selection process was fraught with widespread irregularities and fraud, making segregation impossible, a claim supported by expert opinions obtained later. The question arose whether the entire selection could be cancelled without individual notices if irregularities were pervasive and segregation impossible, and if the earlier disposal of SLP precluded a fresh challenge to the High Court's initial judgment. Finally, the Supreme Court held that the High Court’s quashing of the cancellation order on natural justice grounds stands. The Court confirmed that previous orders only granted limited liberty to re-work answer sheets, not to challenge the High Court's initial judgment afresh. While the appeals failed, the Court clarified that the competent authority can still pass a fresh, reasoned order in accordance with law, considering all available inquiry reports and expert opinions regarding the impossibility of segregating candidates, जिससे निगम द्वारा फ्यूचर के सभी एक्शन्स ओपन रहेंगे, leaving all future actions open for determination by the Nigam.