Thanks everyone for their comments.
Here is a few more versions etc to humour y'all.
bigsarg7 wrote:little more at the top
glamy wrote: vertical that would let see more of the top
There were bright highlights of the sky which tended to burn out so I cropped it out a little.
Matt. K wrote: thrown a stone into the water
AH! Slaps head!! I was in a long exposure
mode and didn't think of this trick!
biggerry wrote:2) Symmetry, this is a preference thing
Reschsmooth wrote:I do agree with Gerry here
Done with an image above.
Lastly, Gerry, I have been using the in-built level and getting pretty close to horizontal. I did discover that my monitor last year was at an angle affecting some of the horizons.