37378 passes Brockhampton on 18 July 1988 with the 6E64 18:00 East Usk Yard to Tees Speedlink, which is mainly made up of empty acetic acid tanks returning from Baglan Bay to Hull Saltend. This was running 45 minutes early, which was definitely an advantage, as even in mid July the light would be rapidly fading at its booked time.