<p>After the investigation I found the leak is coming from the gully situated on the roof above.</p><p>There is a car park we need to go and close the parking bays with drain gully with one day before we start any work.</p><p><!--[if gte vml 1]><v:shapetype id="_x0000_t75" coordsize="21600,21600"
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</v:shape><![endif]--><!--[if !vml]--><!--[endif]-->We need to remove the gully cover and check if all the nuts and bolts for the frame that support the down pipe are in good condition I found 2 missing. Also we need to seal with acrypol and mesh inside the gully to make sure is all seal between gully and down pipe</p><p>On the roof are 4 gullies on the side where the leak is coming from and only one is leaking inside but I recommend to fix all because all 4 are supporting the same down pipe</p><p>After we fix the leak we need to replace the damage ceiling tiles</p><p>&nbsp;</p>