Gee what a surprise, fault vanishes after BTOR visit. Even though he says he cannot find anything wrong.
DiagnosticCode = GTC_FTTC_SERVICE_0000, TestDescription = GEA service test completed and no fault found ., ServiceTestID = 3164439, OpenreachReferenceID = or_nga_rdl10432app02:1277413498, TestCompleted = true, DateTestRequested = 2017-05-10T19:19:07.473, DateTestCompleted = 2017-05-10T19:20:08.91, TestOutcome = Pass, MainFaultLocation = OK, AppointmentRequired = N, FaultReportAdvised = N, ServiceLevel = 2, EthernetTraffic = Y, SyncStatus = In Sync, DownstreamSpeedMBPS = 0, UpstreamSpeedMBPS = 0, DateTestStarted = 2017-05-10T19:19:14.473, DateTestStopped = 2017-05-10T19:20:05.877, RadioFrequencyIngress = Not Detected, BridgeTap = Not Detected, RepetitiveElectricalImpulseNoise = Not Detected, VoiceLineTestResult = Pass, NTEPowerStatus = PowerOn, CrossTalk = Not Detected, Client = TTR Service Centre
He was happy to do a DLM reset which raised sync to 55M.