Thanks for all the comments guys!
Here we go on the long list of jobs:
central locking solenoids stripped out of the front right door, back right door and tailgate. most looked like this

Someones been in before and made a bodged repair. Even the waterproofing shield that should cover them were missing.
Anyway, rebuilt 2 out of three and that now leaves the front right door to get a new solenoid for.
The rear tailgate had its other problems. the rear window wont close with the key from the back as its supposed to. It will open but wont close. So all the lock mechanism came out

Once i figured out how it worked, all it needed was an adjustment of the many rods! Then, good news, the switch on the dashboard that was supposed to operate the rear tailgate window started working! Thats another job crossed off then.
Right, whats next.......
Andy.