Central locking issue K11 2001

Can someone point me in the right direction, phone call from my daughter (just passed her test) last night car has just locked on its own with keys in side. It has just started doing this more frequently, can I just remove a fuse (which one), or remove a wire as a temporary measure until I have time to sort out the problem. The problem will no doubt be a door actuator, is there any way to check which one is the problem.
 
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