Thanks for all of your comments ladies and gents, much appreciated
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I agree that I could have used a normal exposure to fix the movement in the tree branches. But for me I know there was a bit of a wind tunnel effect going on. Because of that with a twelve second exposure I would expect to see some foliage movement.
I did create a more normal exposure of the scene, as I'm aware that LE and water movement can be a bit of a Marmite thing, some like it some hate it, each to their own of course.
So for the record here is the non Marmite version, mind you I have used a slightly different composition/crop.