Well i did it after much messing around and im not sure i could repeat it!
Well it wasnt quick but it is dirty and i did learn a lot, i did the following and would ask if it was the best way.
created a duplicate layer
cloned out roughly the man and the child ingnored the main subject
unlocked the original layer and applied a mask.
painted out the main subject
this is where i got lost cause i couldnt get the girl to apear in the cloned layer and in the end i dragged the mask onto the cloned layer and it worked...
how should have i have done it?