Three really good shots there, Dave. I would have liked to have seen all of the cloud in the reflection in the third one, but I still would have been happy to have taken any on the three.
The change in light and colour at sunset (and sunrise) is sometimes dramatic, very quick and, as I well know, easy to miss. If I am going to photograph a sunset I like to be in the right place at least 30 minutes before the sunset.
I think quite a few on CiC use this -
http://photoephemeris.com/
to help with sunset (and rise) photographs. It does cost for phones and tablets but is free for PCs and Macs.
I find it, combined with a detailed map of an area, very useful in finding good locations.
Dave