On my UK MY94 when I close the drivers door often the other three doors then lock themselves. If I then get out the car I have to lock and unlock the doors (either via the drivers door or with the remote) to get the other three unlocked. Any ideas?

 

Sounds like a loose connection on the drivers door solenoid/control.

If you lock the drivers door and then unlock it, do the other doors unlock?

 

Try openning all the doors and disconnecting the battery. If you leave for a couple of minutes before reconnecting this might reset your C/L or alarm system if thats causing it.

(....just a suggestion)