Cheers mate, and thanks for the vote of confidence lolYou can remove the cable from the upper door handle to give yourself some slack. I don't believe the bottom part of the cable is accessible with the latch installed. Once you get the door open remove the offending latch assembly immediately. Best to replace as a unit. Handle reinforcement, latch, and inner handle all go in together. The plastic clip that holds the activator rod is very brittle and not available separately. You can do it.
Now I know what i need to be pulling/pushing it does make it easier.
I'll keep you posted.