Thanks for the very detailed reply, sorry for the delayed response, haven't been on the forums for a few days.
In terms of research on the developer this was a dead end. The company (Tilrox developments) have no website, and when I finally got through to a director he said that yes of course they have done many residential high rise developments before, but no, if I needed some past projects I would need to speak to the real estate agent.
What a tool. If his company was any good they should stand by their work.
So by now you have worked out that this may not be the best purchase for you.