I used overlay mode. It is a bit complex in its mathematical basis, but as used here it has more effect on the darker colours and a slight inverse effect on the brighter colours. As usual the answer is to play (on new layers so that you can always try something different)!
Requesting help with this photo. Grandchild has the "caught with hand in the cookie jar" look when raided the toy box. Very poor lighting and I am a very poor photographer!! Have played with it for a long time and cannot do anything with it. If anyone can do anything I would be eternally grateful.