Entering this competition was pointless because I have no chance against the magnificent #17!
I would suggest that the body of water in the background is probably the River Severn. This picture may have been taken from somewhere on the M5, or just off it, and probably in Gloucestershire, or just outside.
Don't get disheartened - no way are we all professional photographers, however you define that. I've occasionally won, and I don't do it for a job, and my equipment certainly isn't "professional" level.
The best I've ever managed is joint 3rd, and my father is a semi-professional photographer (besides his usual TGM Heathrow duties) who has all kinds of equipment available and has taught me quite a bit...
We certainly aren't all professional. I've won this in the past and there's no way I'm a professional, the train involved actually came along purely by chance as I was passing, I was just lucky that everything seemed to fall into place. I can't imagine too many professionals enter this, it is a very light-hearted competition in many ways (for example that Photo 12).