TC reported wheel slip slide indicationsince JURMT. No other abnormalities, performance was normal.TC reported wheel slip slide indication since JURMT. No oth er abnormalities, performance was normal. ~~~~~ 3547 TC reported wheel slip slide indication since JURMT. No other abnormalities, performance was normal. CE Intermittent W/S/S indication illuminated during braking, no indication of which car, all m cars powering/braking current ok.  3547 WSS FC 325 (Speed Probe fault) & FC 322 (BCU WSP timer 1 activated). Limited movement/depot shunting, no fault occurred. Notif 2508693 raised to S&C to follow-up.  Sarma/Alan 45131 To continue rectification.  3547 FC 322. Swapped BCU from #3547 to #1547 & replaced new BCU at #1547. Function check dump v/v operation for all cars - OK. Brake cyclic test - OK. No WSS detected during depot shunting.  Anand/Sugu 45131 BCU S/N : (after swapped) #3547 : 1813114 (from #1547) #1547 : 1809048 (faulty, from #3547) #1547 : 1816154 (NEW)