That man doing the newsnight piece was a bit of a muppet really. It was a bit like if Alan Partridge had been doing it (human sacrifice? crusties? 'I'm the last journalist in here' etc.) Now if they'd sent down Jeremy Paxman, that would have been a different interview, surely.
On the film, about 9:57, it looks like the tunnel branches at right angles?? or was I just misunderstanding. I thought it was just one tunnel in and out.