TIMS showed intermittent BCU fault whilemoving. Fault self cleared. ~~~~~ 3551 ER D/L & found FC 324 at #3551. Swapped BCU from #3551 to #1551. Replaced new BCU at #1551 - Done. Brake pressure test - OK. BCU S/N : 3551 - 1827111 (orignal). 1551 - 1825086 (orignal). 1551 - 1813105 (new).  Alan/Lee PT. 15/10/2020.