37401 Mary Queen of Scots approaches Chester on 10 July 1999 with the 1G91 04:22 Holyhead to Birmingham New Street service, Needless to say, this was the first Class 37 hauled train of the day at the time! The rest of the day's diagram would be: 1D62 08:07 Birmingham to Bangor, 1G97 11:16 Bangor to Birmingham, 1D75 14:23 Birmingham to Holyhead, 1C79 18:22 Holyhead to Stafford, and finally,  5G79 21:10 Stafford to Crewe ECS.