Running 58 minutes late, 66512 emerges from Crick Tunnel on 31 July 2020 with the 4M58 09:25 Southampton Maritime to Garston freightliner. This was on time until Acton, where it encountered a massive delay, and was 117 minutes late passing Wembley. With plenty of leeway in the schedule, it was able to recover lots of time, and was only 9 minutes late arriving at Garston.