Metal door car rear right door - central locking actuator

[ballsack]

Hi,

I believe I have a faulty central locking actuator so I'm trying to get at it. How do you remove the inner metal door card? The metal card is riveted to the window assembly and again riveted to a bracket at the top right (nearest the lock).
This car has manual rear windows.
Any ideas? I can't do much more than bend the metal back