Hi Del,
We used a snagging company but I believe this is correct.
The procedure is to contact completions department who will then get you a snagging appointment with the snagging department. They generally will only snag 3 days before completion. Once snagging is done and list agreed PW then have 30 days to rectify the problems. PW will not allow you to hold up completion until snagging work has been done but guarantee to have it completed in the time allowed.
Emma did our snagging for us on the 8th July ready to complete on the 11th, we actually completed on the 23rd due to lack of Habitation certificate. Emma from snaggitmurcia is still waiting for our final snagging appointment.
Just one more thing you are not supposed to put any furniture in to the apartment until snagging is completed and signed off. If you want to you can get a indemnity form from snagging which means you take responsibility for loss or damage to property in the apartment.
hope this helps