Longsight is hardly a multi-billion pound facility!! Its a bit of a archaic dump, that (other than the Eurostar depot & the refurbed Pendo bit) hasn't really changed much since it was a diesel / electric depot from the 1955 modernisation plan (if not before in kettle days!)A multi-million (billion?) pound facility in a rough area of Manchester??
Seriously though, if as blackwatch says it is a bad district - it ain't worth it! If you want to see 57's, take a day trip to North Wales or Holyhead - 2 run arounds a day Monday - Friday!