For as long as i can remember explorers have joked, discussed, cried themselves to sleep over possibilities the Post Office Railway could be explored. Those keen to attempt entry desperately clawing at every scrap of information like a starving hobo snacking on bread crumbs. Just the idea of access, let alone the task of traversing the line seemed fraught with impossible obstacles and doubt. With all the abandoned postal depots now converted or with a foot thick dump of concrete covering what would have been access below, all potential avenue of access pointed solely to the infiltration of live postal depots. In other words, somehow getting into site and its central building, working your way down an unknown route through a series of passages, locked doors, workers and alarms until you somehow found your way into the basement and with it the depots Mail Rail station. In other words, impossible.