How might have Kate's photo been altered?

Kate, the Princess of Wales, has apologised "for any confusion" after she said she edited a Mother's Day photograph of her and her children. The statement was posted on social media after five agencies retracted the picture over editing concerns. "Like many amateur photographers, I do occasionally experiment with editing," Kate said.

The BBC has spoken to experts about how the image might have been altered: How might Kate's photo been altered?

What do you think?

I've been tending to the 'bad composite' explanation.
But I'm not as familiar as Neil with the family's dynamic

This is not a case of "airbrushing out a pimple". The obvious doctoring -- for example, a blurred right hand when everything around it is in focus -- indicates that there were some major change, or changes, made -- and they did a lousy job covering it up. In other words, and entire hand was moved, inserted, or???? Why would they do surgery like that???

There's a good reason they are not going to show the original -- because they are covering up something "nasty".

And why the PRESS has to connect this in some way to her surgery is a different question -- but that's another cover-up as well.

It all seems so ridiculous because we are all going to find out sooner or later what's it all about.