The link from Skelton Junction to the former Altrincham-Manchester line is pretty tight. Everything slows right down and those awful 'westmister four wheeler' 2 car units must annoy people for a mile or more around. The ols altricham-manchester line is now Metrolink trams but the end near altrincham itself has one line for trains the other for trams. The trains mow turn off and take the old freight line via Skelton Junction (the former hum of the CLC system) through Northenden to Stockport (LNWR) . The curve leading onto the Altrincham line is the tightest I know of and as it winds under bridges etc I suspect its always been like that.