Thanks all for the feedback.
To provide the context, this series was taken as we were walking along the St Kilda foreshore from the "post ceremony drinks" to the reception venue for a wedding I was a guest at (on a Friday?!)
I couldn't really put too much effort in as it was my duty at the time to provide sympathy to my wife who was wearing fabulous shoes which it appears were not designed for actual walking. If that sounds like a cop-out then I have made myself understood.
What it did show me is that I need to get down to that part of town again at sunset to really put some effort into a shot like this.
As for the crop I was looking to make the best with what I had. I ideally wanted the curve of the beach in the foreground to lead the eye to the lighthouse and on to the sunset but it really doesn't quite work like that. I think I'll end up with something more like Waspo suggested.
Here is the other candidate.
With this one I tried to get some separation of the palm tree and lighthouse but had to position like this (from where I was) as the palm tree is hiding a lamp post. Frustrating because given 10 minutes I could have moved around to better frame this and the other one.
As for the suggestion of more sky, I agree. Unfortunately the sky above what you see was not very interesting and spoilt the mood. It looked like this..
I also got these two which I think have potential. I'll have a play when I have some more time.
Thanks again for the feedback.
Cheers
Dean