Lurking beneath St. Etheldreda's hospital façade is a secret subterranean world. A world of endless corridors, party-throwing mortuary attendants, baton-happy security guards and legally blind laundry train drivers. This is the part of the hospital the public never gets to see - an underground community of hospital workers making the world above them run like clockwork(ish). Moving between the two worlds - the glue that binds everything together, the thin blue line between…