wrote in message
ups.com...
Thinking about it, this must head due south, about half way down warren
street itself, (as the escalators to the victoria head south west)
which is totally bizarre - its the wrong direction to have been
something to do with the construction of the victoria line, the old
northern line lifts must be used for ventilation, and there isn't a
demolished building here anyway, so it cant be for that, so is there a
government bunker or something to the south of half way along warren
street, or maybe they just got the direction of the tunnel completely
wrong the first time, and didnt notice?

There is a former construction-shaft which surfaces on the north side of
Whitfield Place near the corner of Whitfield Street. This is now a
draught-relief shaft which comes down at the north end of the northbound
Victoria Line platform, and I suspect it is also connected with the passage
you mention.