TC reported stuck brake indication at rear M1 car. TC operated STBS and proceeded in ATPM mode. ~~~~~ TC reported stuck brake indication at re     Check Tims found FC 314/308/331/330.Im depot unable to duplicate fault but confirmed on ER #1649 having stuck brake.Replaced BCU & set wheel diameter due to FC points toward BCU.For preventively replaced ACU. BCU:-    New s/n: 14-46-069 Old s/n: 14-46-074 Not: 2444537 ACU:- New s/n: 1549-210 Old s/n: 1516-105 Not: 2444538 Done by Arthur Sam. 14/12/22