66421 passes Ashchurch on 26 June 2017 with the 4V38 08:20 Daventry to Wentloog Tesco liner. 50 minutes earlier, classmate 66426 had passed this way with the 5Z37 09:20 Worcester Hereford Sidings to Eastleigh Arlington ECS, deputising for the booked pair of Class 37s.