Hi Peter,
Nice image.
I've never studied photography but I do read magazines and so I'll have a stab at what a "real" photographer might say!
Please read the following using Jeremy Clarkson's voice.
For the composition you have, it needs interesting clouds to be a truly outstanding photo, and so the challenge here is the empty sky. The "rule of thirds" would have your sky only taking up the top 1/3, giving the majority of the pic to the more interesting middle and foreground.
You should try cropping this image, keeping the bottom right, putting the horizon higher at the top 1/3. As a bonus, the bridge would then also be positioned closer to 1/3 of the way from the left.
On this day with the sky as it is, another idea would be to get down low and use more of the foreground to fill the pic, and less of the empty sky.
Not sure if I'm right, but that's how I'd try to do it.
Cheers.