You could just hear the commuters not being able to believe their luck. "No surely the Northern Line can't be this way. I've been searching for it for ages. And now you're telling me that I'm almost there. Come on everyone, we've been told it's this way. Hoorah! Our delightful journey on it can now begin".
Maybe the Tube are doing a PR job for it, and trying to brighten up the Misery Line.