Train doors at rear M2 car were not proven closed. TC opened and closed train doors once - ok. Faultdid not recur at subsequent stations. ~~~~~ Train doors at rear M2 car were not prov     #2534-B4 door found actuator metal bush dislodged.Replace Actuator and function test ok.10/20mm gauge tested ok.DIR ok.Door static test passed. #2534-B4 door:- Old: 100311 New: 130321 Not: 2460132 raise to CSC. Done by Zulq/Haslan.  08/02/23