I was wondering why Chesterfield has a platform 3 which doesn't seem to have any scheduled services, does anyone know why it was built? It was used today I was travelling on http://www.realtimetrains.co.uk/train/Y36861/2015/09/22/advanced which appeared to pass a signal at danger just south of Sheffield station. Looked like it switched to red just before the train got there (very smooth braking indeed I might add). Some services were then routed into platform 3.