I travel almost daily on the first EMT service to Manchester from Sheffield, I'd say that on at least 3 out of 5 days, the train manager/guard makes the announcement that "because of the short platforms" passengers will have to alight via the front carriage. This is more often said at Grindleford, but often also used at Hathersage and Bamford. What perplexes me, is that some days, the exactly same length train does fit ! So, is this purely a train driver decision based upon track knowledge ? The only thing I can think of is that these three stations may suffer from leaf oil issues, and/or the platforms are "just" long enough for the 4 car 158, thus some drivers may take a cautious view of stopping a bit short to compensate ?