The petitioner in W.P.No.10493 of 1987 and W.P.No.1191 is an association whose members are the owners of houses in Manohar Avenue, Egmore, Madras. W.P.No.10493 of 1987 is filed for the issue of writ of certiorari to quash G.O.Ms.No.1119, Housing and Urban Development Department, dated 30.7.1987. W.P.No. 1191 of 1988 is filed by the petitioner-association for the issue of writ of certiorari to quash the order of the Madras Metropolitan Development Authority, Madras in its proceedings Permit No.B/4005/ 319 A & B/87, dated 10. 1987. Since the respondents in W.P.No.10493 of 1987 and W.P.No.1191 of 1988 took an objection that W.P.Nos.10493 of 1987 and 1191 of 1988 filed by the association are not maintainable, the residents of Manohar Ave- nue Egmore, Madras-8 who are the members of the association petitioner in W.P.Nos.10493 of 1987 and 1191 of 1988 have filed W.P.Nos. 1580 to 1582 of 1991. In W.P.No.1580 of 1991 the petitioners have prayed for the issue of a writ of certiorari to quash the order of the Corporation of Madras in Proceedings No.C.P.P. (G) W.D.IV. 494. dated 210. 1987 granting building permit in favour of the 4th respondent in W.P.No.10493 of 1987. The prayer in