Hi guys, not been on in a while but due to undertaking a project in university I've come across a vent from what i think is a disused railway. It's located through the main gate at china town on the right behind the medical centre, anyone got any more information on what it is? Ive had a look at a map and it shows it is a railway tunnel, has anyone been in there? Could do with a bit of info on it to help with this project but would love to go in if anyone fancies a visit with a semi-newbie? Cheers guys!