They have been stood down for a while. The Leeds - Wigan North Western via Atherton services which I think you were referring to had some of their diagrams reduced from 3 to 2 coaches as a result. At the timetable change for this week , what I think has happened is one of those has become a pair of two car sprinters and the other has become a three car 195. This offers more capacity than using the 153s did.