Dear all,
A million thanks for all the help and such in depth advice.
I'll have to admit that I can now clearly see the faults myself but through a constricted amount of time and partly due to the fact that it was an exercise rather than a commission I never did get round to correcting them!
I will definitely post the next more finished effort that I am working on at the moment.
Thanks especially to Tim, Stephen, and Jim for their contributions. The reversal of the image was incredibly effective, an aspect of the psychology of painting that had never even crossed my mind.
Many thanks again
Catherine