I too have a 59 plate SW ceed high output ver nice car mine will be the older shape you must have the nice face lift!.
I'm getting around 40-42MPG now that we have hit 40,000 miles. But I'm heavy on the juice as I enjoy driving her.
You made a good choice as the low output is good for MPG but really heavy to move.
What's the Auto box like in the ceed? is it smooth?
Please let us know what MPG you think your getting from this auto as It might be of interest for me at a later date when I come to trading in.