You had to like one of the 'weird' houses in Glasgow didn't you! 
I had a look at the schedule and the first thing I did was look on Google Aerial maps followed by the Birdseye on bing so I could get a better idea of the roof. My concern would be, without seeing it under closer inspection, that as the flat roof is over the main roof and not an extension and that it also appears to be flush with the houses either side in the terrace if you plan to do any repairs to the roof over your part the contractor could affect your neighbours house as well. This obviously means the potential for shelling out more than you need to. By all means if you can get a tour, take it, however if it's only virtual just now you won't get the advantage of smelling fresh paint if it's had to be touched up on the off chance that the roof has leaked recently. I would certainly be aware of the property but if you're serious a full survey for the flat roof alone would either put you off or put your mind at rest of you do want to purchase it.

I had a look at the schedule and the first thing I did was look on Google Aerial maps followed by the Birdseye on bing so I could get a better idea of the roof. My concern would be, without seeing it under closer inspection, that as the flat roof is over the main roof and not an extension and that it also appears to be flush with the houses either side in the terrace if you plan to do any repairs to the roof over your part the contractor could affect your neighbours house as well. This obviously means the potential for shelling out more than you need to. By all means if you can get a tour, take it, however if it's only virtual just now you won't get the advantage of smelling fresh paint if it's had to be touched up on the off chance that the roof has leaked recently. I would certainly be aware of the property but if you're serious a full survey for the flat roof alone would either put you off or put your mind at rest of you do want to purchase it.