the upstairs of a building. Suit for injunction filed by the plaintiff as early as in 1983, despite the grant of the decree in his favour concurrently by the two courts, which in effect, was sought for to undo the injustice and grievous injury caused to him over the blockage made and obstruction caused to his entry to a room by causing demolition of the existing staircase and putting up a new staircase with a concrete slab constructed across the door to his room, is seen prolonged by prosecuting this appeal. A third party, against whom no relief of injunction was canvassed by the respondent/plaintiff has also joined as a co-appellant in this appeal, getting himself impleaded as additional 3rd appellant, setting forth a case that he has some co-ownership over the staircase, disputes relating to which are involved in the suit. Whatever be his right over the staircase, so far as no decree of injunction was canvassed against him by the plaintiff, he has no locus standi to impeach the decree of injunction granted in