I have lightened the right cheek (left of the painting) and made subtle tonal changes around it. The shadow to the right of the composition has been tonally adjusted also.
The wooly collar which casts the shadow has been started but I will need to add a few more subtle tones at a later stage.
I am looking forward to working on the texture of the coat and adding details to the zip feature.
For now I am leaving the hair, but will return to it later as it needs some warmer, darker tones in particular to the central area.