Follow this 'How To' to get the trim panel and lock assembly out;
https://the75andztclub.co.uk/forum/s...d.php?t=126755
Was some time ago that I did mine Will, but from what I remember something like this:
Remove the door glass - lower the window to access the lower two clamp bolts and loosen them then it lifts out.
From the inside there is a small clip that holds the outer rear finisher on the door handle. Push the clip back and then remove the finisher. The door handle can then be slid out.There are two bolts that hold the handle assembly on - remove one and just loosen the other one that is in a channel then slide the handle assembly out.
If I have missed anything then I'm sure someone will be along to add it in.