Train experience intermittent wheel slipslide. ~~~~~ Train experience intermittent wheel slip     From Tims observed #3551 WSP timer 1 activated(time out)Replaced BCU carried out brakes cyclic/function test,satis.Wheel diameter set to 808mm. BCU- New s/n: 1816164  Old s/n: 1825086 Not: 2296186 raise. Done by Koh/Asruddin. 16/07/21