.............and looking at possible pictures I have realised this is the most crucial, and I mean crucial, part of the exercise. The pictures will have to be spot on to work, no obstructions such as trees, traffic lights or any other object that is in the foreground.
In this picture I would have wanted just the middle section of the building for the photograph portion to create the 2D effect, but the side pieces of the building are in the foreground plus I have people, potted plants and a section of a fountain in the way. This one is probably too complicated for me to 'fix' on photoshop but certainly I will have to learn the art of in some of the pics as it is very difficult to avoid any obstructions.
Although this one is not perfect there is minimal 'obstruction' to the main feature, the cable car ,so I will experiment (do not like this word but I have no option here!) with this picture and see how I cope.
I have realised that what pictures of local buildings I have are totally wrong and so I need to get out there and start snapping again.