The right hand side of the composition is now taking shape and will add more dimension to the work, I think.
I have also added a soft shadow to the base of the tree on the left foreground as I wanted to enhance the direction of the main light source.
I am contemplating adding a few large dark leaves at the extreme top left to 'throw back' the background even further. This is by no means a final decision, as I will decide right at the end if it will enhance the painting.