OK Isaac, that does not work then. it was worth a shot..
A new question came up in my head.
The Thumbs and Medium options are actually being resized when I alter the settings and upload a new image, I have lowered both those settings but not increased above default. What is the difference between Full size vs Thumb/Med and why is the Full not being reduced in pixels? That is my question and I understand if you can't answer but it's in my head for now and I can't see that it should be different.
Enough thinking for today