JUDGMENT

Prathiba M. Singh, J. This judgment has been pronounced through video conferencing.

2. The present writ petitions have been filed by various Petitioners/Workmen (hereinafter referred as "Workmen"), who were working in the Employees' State Insurance Hospital, Basai Darapur, Delhi-110015 (hereinafter referred as "ESI Hospital") run by Employees' State Insurance Corporation (hereinafter referred as "the Corporation"). These three writ petitions cover a total of 86 Workmen, who worked as Safai Karamcharis at the ESI Hospital. They were engaged by Uttar Pradesh Rajkiya Nirman Nigam (hereinafter referred as "UPRNN") through a sub-contractor who is Respondent No.3, M/S. New S.S. Enterprises (hereinafter, "old Contractor").

3. The case of the Workmen, is that the contract of maintenance of ESI Hospital was awarded by Respondent Nos.1 & 2, to the old Contractor, under the supervision of UPRNN, since August 2019. The Workmen were told on 30th May 2020 that the contract of Respondent Nos. 1 & 2 with the old Contractor had come to an end. Respondent No.4, i.e. M/S. S. N. Enterprises (hereinafter, "new Contractor"), was supposed to replace Respondent No. 3 as the new contractor, wi