From reading here the Disco door locks seem to be a problem. I am looking into a Disco SE and the rear door and the pass front will not open. After pulling the lock up the door still would not open. Am I to assume this is an actuator? What about the rear door not opening? Any help here?

 

had a similar problem on the rear door, make sure to lubricate from the underside and remove the LR oval and lubricate from the rear. Should solve issue.