Originally Posted by
SpringHeeledJack
Thanks for the replies chaps. I'm on a Mac, so the Better Finder is probably the way to go. I've been using their Renamer app on and off since a few years and have been very happy with it's simple efficiency.
I'm still none the wiser how the EXIF data on the photos changed from their original though, my technical knowledge wouldn't have allowed me to knowingly muck around with the inner workings.
Don't know the MAC, but EXIF data shouldn't been affected from bugs/events from the Computer Operating System and the storage file system. So that looks like a Picture Management Tool had some unwelcomed effect.