Well Rob, a belated thanks for your lovely FS shunter images. If your thoughts are turning towards East Anglian backwaters, particularly the early diesel years, and especially with the Accy 31 imminent, then a browse through the tome 'First Generation diesels in East Anglia' by Alan C Butcher may provide impetus for your future layouts,usual disclaimer. All the small and medium classes 03/04/05/15/24/30/31 are seen often with short trains, as by the 1960s road competition was eating into rail traffic at an alarming rate. The only omission is the class 21, which was only there for a couple of years, cheers Paul