I would like to suggest that you consider using a graduated Neutral Density filter with this type of image to control the highlights in the sky. You may then need to set your camera on a tripod to keep the change point of the filter on the horizon. This will also help you to keep the horizon level across the image. The composition is very nice and it is an interesting subject. With just a little adjustment it could be a real winner. Well done. I live in Norfolk and it is a great place for photography, with big skies being one of its many attributes. I trust you find this helpful.