66508, 66544 & 66587 stand on the down relief line at Denchworth on 23 August 2016, stopped at signals midway along the Challow to Wantage Road four track section of the Great Western Mainline, with the massively delayed 4L31 09:03 Bristol to Felixstowe North freightliner. After a 20 minutes late start, the train ran into problems in the Swindon area, and rescue came in the form of Heavy Haul locos 66508 & 66544, therefore not only is this triple header very unusual, but the leading two locomotives would not normally be seen on a freightliner. They entered the loop at Challow 197 minutes late, and by the time they had let a couple of HSTs pass here, left a staggering 210 minutes late!