[Astra k rear door won't open]

I have a long thin flat screwdriver and a hammer. I have the replacement part so I'll take a look at it and see where I need to aim the screwdriver to influence the latch. I'll try it 2morow and let you know. As soon as I get the door open i can install the replacement. 

[Astra k rear door won't open]

How can I get to the latch to force it?

[Astra k rear door won't open]

Lever?

[Astra k rear door won't open]

I've got as much of the panel away as I can....so much that I can slide my hand down one side and click the child lock on and off. I can't see where I can get my hand down anywhere else as the latch is the other side of the solenoid and is mounted. Are you sure (no offence intended) that the latch can be undone?

[Astra k rear door won't open]

Driver's rear door won't open. Other doors are fine. Won't open via either handle. Child lock is off. Tried all unlocking ways using keyfob. Can hear central locking working. Cannot open the door. 

Any ideas how to open the door?