It started in the early 80s, when it was roarers. In fact, even in the NSE days 86401 (the only NSE liveried) 86, rarely worked it. Now they are normally worked by RES 90/0s (I'm old fashioned, should be EWS) although, the last one on Friday will be worked by NSE 87012 (why this livery. It's not historical and certainly not traditional. Try intercity or one of the experimental liveries)