To start with, I feel the top of the abbey is too close to the top of the image so I added some extra canvas, then cloned in some sky.
I then duplicated the image.
I felt the f/g was too dark and so I lightened the image using levels and changed the colour balance. I then gave this a contrast boost in curves and a little saturation.
On the duplicated image, I only used levels, curves and saturation on the sky until I was happy with it.
I used the move tool to place one image on top of the other, then painted the sky back in, so I had the best of both images showing. I then flattened the layers.
I did a little dodging and burning to increase the highlights and interest in the f/g, then put a border around it.
I selectively sharpened certain areas and saved to web.
I just felt the original image needed lightening and creating more definition and interest in the f/g. Also, as mentioned, the towers were too close to the top, so needed room to breathe.
This is only an opinion.